hjic: A Pathfinder
This is a computer-generated pathfinder created against the Distant Reader study called hjic.
Each Distant Reader study carrel is composed of many individual items. Each item is bibliographically described with author, title, date, summary, and keyword values. Below is a list of the items' most signficant keywords as well as lists of the items themselves. Purpusing the content of this pathfinder provides the student, researcher, or scholar with one way to get their heads around the scope of the carrel. The keywords include:
Water; System; Concentration; Process; Time; Surface; Acid; Temperature; Data; Reaction; Gas; Page; Production; Energy; Control; Case; Samples; Oil; Rate; Properties; Phase; Parameters; Treatment; Results; Simulation; Flow; Analysis; Pressure; Algorithm; Membrane; Table; Solution; Method; Carbon; Waste; Voltage; State; Activity; Power; Values; Current; Enzyme; Corrosion; Extraction; Mass; Fermentation; Network; Design; Function; Effect; Industry; Size; Heat; Liquid; Separation; Adsorption; Test; Air; Hydrogen; Chemistry; Quality; Wastewater; Metal; Field; Column; Plant; Manufacturing; Cutting; Removal; Flux; Chem; Hungary; Controller; Speed; Min; Fuel; Tool; Frequency; Soil; Composites; Graph; Equations; Points; Batch; Compounds; Index; Composition; Position; Angle; Light; Software; Equilibrium; Viscosity; Torque; Starch; Food; Technologies; Signal; Technology; Ion; Fibre; Iso; Development; Recovery; Factors; Electrophoresis; Complexes; Images; Change; Bacteria; Parameter; Ebc; Scheduling; Students; Phosphorylation; Concentrates; Head; Workshop
Depending on how this pathfinder was created, many of the bibliographic sections will include elaborations on the meaning(s) of the given keywords. These elaborations were generated by feeding the items' summaries to a large langauge model and asking the model to address the question, "What is X?", where "X" is the keyword. The result will be a few sentences of elaboration. Be forewarned. The elaborations are often plausible, but they should not be take as truth. Instead, they should be taken as points for consideration.
Water
- A NOVEL METHOD FOR DETECTION AND ESTIMATION OF COPPER(II) IN WATER by Bhutra, M. K.; Vyas, A.; Bhutra, G.L. (2002) - Estimation of copper Standard copper solutions were made from copper sulphate and estimation of Copper (II) was done using atomic absorption spectrophotomerric method (AAS) (6]. If the colour of reagent does not disappear within 5 minutes it indicates that copper concentration is well within permissible limit. Keywords: colour; copper; field; test; water
- THE INFLUENCE OF WATER SOLUBLE VARNISHES ON THE CATALYST DURING ENAMELLING PROCESS by Balgaranova, J. (2002) - Conclusions The investigation is of interest in view of the possibility of using water soluble enamel varnishes for production of enamel wires. Comparatively few data exist on the influence of these poisons on platinum and other catalysts containing noble metals. Keywords: catalyst; enamel; vapour; varnish; water
- A STUDY OF DRYING PROCESS by Haghi, A. K. (2002) - To simulate the two stage-sorption process, David and Nordan [10] proposed an exponential function to describe the rate of change of fiber water content, which needed to be adjusted according to the measured fabric moisture content. Two of the equations involve the conservation of mass and energy, and the third relates fiber moisture content with the moisture in the adjacent air. Keywords: coefficient; diffusion; drying; fiber; heat; moisture; rate; sorption; temperature; water
- ASSESSMENT OF DEGRADABILITY IN WHOLE EFFLUENT TOXICITY TESTING USING BIOLUMINESCENT BACTERIA by Kováts, N.; Szalay, T.; Kiss, I.; Kárpáti, Á.; Paulovits, G. (2002) - 274 Table I Results of toxicity tests made using ToxAlert. where fkt mean of fkt of the two control samples lo luminescence intensity of the control test suspension let corrected value of for test sample cuvettes immediately before the addition of the test sample Then the inhibitory effect lit of the test sample was calculated (Eq.(3)). Keywords: assay; effluent; exposure; sample; test; time; toxicity; water
- THE STABILITY OF THE LOW ALLOY STEELS IN ORGANIC SYSTEMS WITH SUCCINIC AND ADIPIC ACIDS by Sutiman, D. (2002) - These show primarily the displacement of the absorption frequency of the group coo- of the two acids from 1700 to 1685 cm·1 for succinic acid and from 1695 to 1680 cm-1 for adipic acid due to a stronger bonding of oxygen. These are situated at 380 and 360 cm-1 in the I.R. spectra of the compound with succinic acid and at 371 and 352 cm'1 in the spectra of the product with adipic acid. Keywords: acid; acid acid; adipic; concentration; corrosion; water
- THE INFLUENCE OF WATER CONCENTRATION ON THE CORROSION OF LOW ALLOY STEELS IN THE SYSTEM METHANOL – ETHYLENE GLYCOL – MALONIC ACID by Sutiman, D. (2002) - The behaviour of three type of steel, with a variable carbon concentration (from 0.20 to 0.40 %) is studied in medium of methanol - 10 % ethylene glycol - 5 % malonic acid with water concentration varying between 1 % to 5 %. This paper continues the study about the influence of water concentration over steels with different carbon concentration. Keywords: acid; concentration; corrosion; system; water
- MODIFIED SCALE CRYSTALLIZATION AND DISPERSION STABILITY IN MAGNETIC WATER TREATMENT by Lipus, L. C.; Krope, J.; Garbai, L. (2001) - Alternatively, the abundant precipitation of aragonite could be explained by Lorentz ion shifts, which have an influence on the value of ko and on the concentration of crystal - forming ions at the growing surface. Alternatively, the abundant precipitation of aragonite could be explained by Lorentz ion shifts, which have an influence on the value of ko and on the concentration of crystal - forming ions at the growing surface. Keywords: ions; mwt; scale; surface; treatment; water
- THE INFLUENCE OF WATER CONCENTRATION ON THE CORROSION OF LOW ALLOY STEELS IN THE SYSTEM METHANOL - ETHYLENE GLYCOL - FORMIC ACID by Sutiman, D.; Căilean, A. (2001) - The behaviour of three types of steel with a variable carbon content (from 0.2 to 0.4%) is studied in medium of methanol - 10% ethylene glycol- 8% formic acid with water concentration between 2% to 10%. The corrosion final compounds, for every value of water concentration, were insoluble in the system. Keywords: acid; concentration; corrosion; formic; system; water
- ARSENIC, ZINC AND MAGNESIUM ION REMOVAL FROM WATER BY NANOFILTRATION, MODELLING OF REJECTIONS by Gergely, S.; Vatai, G.; Békássy-Molnár, E. (2001) - [7] modelled the salt rejection of nanofiltration membranes. 7. HAGMEYER G., GIMBEL R. : Modelling the salt 25 rejection of nanofiltration membranes for ternary ion mixtures and for single salts at different pH values. Keywords: arsenic; ions; membrane; rejection; table; water
- DRYING PROCESS AND RESOLUTION OF ALKALI SILICATE POWDERS by Hasznos-Nezdei, M.; Pallai-Varsányi, E. (2001) - On effect of heating the dried powderlike product dissolves in water, and the obtained solution keeping likewise its colloidal properties can be used advantageously. The dried products are dissolved in water to different degrees depending on the final moisture content and on the SiO-;/ Na20 module value. Keywords: content; dryer; glass; moisture; particles; silicate; solutions; water
- NEW POSSIBILITIES FOR THERMAL WATER TREATMENT by Ujhidy, A.; Bucsky, G.; Németh, J. (2001) - The heating of homes with thermal water has raised a number of technical-financial problems, so now only secondary utilization seems to be economical. Characterization of thermal waters The definition of mineral and medicinal waters was modified several times in the previous century. Keywords: carbon; dioxide; point; pressure; scaling; water; zalakaros
- GOING FOR ZERO by Gwehenberger, G.; Erler, B.; Schnitzer, H. (2000) - Table 1 Simplified input/output table of a steel mill Output: Steel waste water used air solid waste partially sold, reused and recycled Input: %out %out %out %out of% of% of% of% Scrap iron 85 0 0 15 100 100 100 . Production of Medical Infusion Solutions: The main emission is waste water in drinking water quality at a temperature of about 40°C. Keywords: case; cooling; emission; energy; process; steel; waste; water
- IMPROVING ECO-EFFICIENCY BY AUDITING STEAM AND CONDENSATE SYSTEMS by Petek, J.; Glavic, P. (2000) - High pressure steam was needed for heating the air in the chambers and low pressure steam for cooking. 2. Review the operation of steam systems used only for occasional services. Keywords: boiler; condensate; energy; pressure; production; steam; system; waste; water
- NEW WASTE MANAGEMENT SYSTEM IN ZIRC AREA by Vonyó, A.; Tamaska, L.; Rédey, Á. (2000) - While in the large majority of Western European countries significant achievements can be observed as far as prevention of waste generation, reuse, and recycling of solid wastes are concerned, the case in Hungary is quite different. Almost every Hungarian settlement has its own problem connected with solid wastes. Keywords: budapest; collection; disposal; hungarian; landfill; management; site; system; town; waste; water; zirc
- APPLICATIONS OF MEMBRANE TECHNOLOGIES IN WATER REUSE FIELDS by Zsirai, I.; Kicsi, G. (2000) - Applications of MF & RO in Water Reuse Projects within the Power Industry Driven by unsatisfied user needs due to unreliable operation of the conventional · pre-treatment, technological development in the field of microfiltration and membrane manufacturing cost reductions due to increasing application of microfiltration membranes throughout the water and wastewater industry, microflltration is being increasingly applied to replace conventional boiler feed water pre-treatment processes. These features provide flexibility to a membrane plant, which m turn allows for treatment of a variety of streaniS. Keywords: prefiltration; pre-treatment; membrane technology; microfiltration; reverse osmosis; hollow fibre; ZeeWeed® membrane; wafer reuse and recycle Introduction The increased public concern over health and the e~vironment, the .increasingly stringent effluent dtscharge criteria, the limited water supplies for meeting prevailing and projected water demand at a specific location along with the increasing fresh water costs strongly affect the large industrial water consumers, such as the power industry. . Keywords: fibre; membrane; plant; power; process; treatment; water
- The Role of Water Activity in Terms of Enzyme Activity and Enantioselectivity during Enzymatic Esterification in Non-conventional Media by Lajtai-Szabó, Piroska; Nemestóthy, Nándor; Gubicza, László (2020) - To provide constant reaction parameters, water activity should be kept constant. Water activity is an index which indicates how much water is accessible to the enzyme. Keywords: activity; doi; enantioselectivity; enzyme; media; reaction; solvents; water
- Informative Environment Qualifying Index by Utasi, Anett; Sebestyén, Viktor; Rédey, Ákos (2020) - Environmental parameters for which no limit values are specified can be studied as well, since the numerical target for the environmental parameters should be deter- mined by specialists and such values are to be included in the list of environmental parameters. i,Wl is the weight of the ex- amined environmental parameter, and nPj is the number of environmental parameters in the case of environmental element i. Environmental parameter quality indicator (∆Pi) The environmental parameter quality indicator (∆Pi) is given by ∆Pi = (IPi) 2 π FPi 360 (3) where ∆Pi is the environmental parameter quality indica- tor for environmental parameter i, IPi is the environmen- tal parameter quality index for environmental parameter Keywords: assessment; element; environmental; evaluation; index; limit; number; parameter quality; parameters; quality; quality index; value; water
- Magnetic Field Analysis on Electromagnetic Water Treatment Device by Kozic, V.; Krope, J.; Lipus, L. C.; Ticar, I. (2006) - 54 Conclusion We analyzed EM magnetic devices, which have been used in industry for many years and show good results in scale prevention. MAGNETIC FIELD ANALYSIS ON ELECTROMAGNETIC WATER TREATMENT DEVICE V. KOZIC1, J. KROPE2, L. C. LIPUS 3 and I. TICAR4 1Zdraviliško naselje 14, 9252 Radenci, SLOVENIA 2Faculty of Chemistry and Chemical Technology, 3Faculty of Mechanical Engineering, 4Faculty of Electrical Engineering and Computer Science, University of Maribor, Smetanova 17, 2000 Maribor, SLOVENIA A short review of magnetic water treatment devices is given. Keywords: field; flux; magnetic; plate; water
- Downloadable Full Issue by none (2020) - Phys., 2010, 108(1), 87–96 DOI: 10.1080/00268970903514553 [4] Tavares, J. M.; Weis, J. J.; Telo da Gama, M. M.: Strongly dipolar fluids at low densities compared to living polymers, Phys. [22] Freitas de Oliveira, D. W.; Lima França, Í. W.; Nogueira Félix, A. K.; Lima Martins, J. J.; Apare- cida Giro, M. E.; Melo, V. M. M.; Gonçalves, L. R. B.: Kinetic study of biosurfactant production by Bacillus subtilis LAMI005 grown in clarified cashew apple juice. Keywords: acid; activity; adsorption; air; analysis; area; biosurfactant; case; chemistry; clay; concentration; control; doi; effect; element; energy; environmental; field; fig; figure; glucose; hungarian; index; industry; ions; journal; limit; load; membrane; method; mode; nickel; number; oxygen; parameters; production; quality; rate; reaction; reference; results; subtilis; surface; surfactin; system; table; temperature; time; value; viscosity; water
- Daphnia Magna Acute Immobilization Test: an Opportunity to Test the Ecotoxicity of Alternative Fuels by Hubai, Katalin Eszter (2021) - DOI: 10.7901/2169-3358-2008-1-929 Toxicity of water-soluble fractions of biodiesel fuels derived from castor oil, palm oil, and waste cooking oil. Keywords: biodiesel; daphnia; doi; ecotoxicity; magna; oil; test; toxicity; water
- Production and Characterization of Sand-Plastic Composite Floor Tiles by Jock, Alexander Asanja; Akpan, Messiah Luke; Oluwadayo, Francis Asokogene (2022) - 29–32 (2022) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2022-06 PRODUCTION AND CHARACTERIZATION OF SAND-PLASTIC COMPOS- ITE FLOOR TILES ALEXANDER ASANJA JOCK*1, MESSIAH LUKE AKPAN1, AND FRANCIS ASOKOGENE OLUWADAYO2 1Department of Chemical and Petroleum Engineering, University of Uyo, Uyo, NIGERIA 2Department of Chemical Engineering Technology, Auchi Polytechnic, Auchi, Edo, NIGERIA The amount of plastic waste generated in developing nations like Nigeria is increasing day by day, which is non- biodegradable and causes environmental pollution. Keywords: plastic waste, floor tiles, low-density polyethylene, pollution, properties 1. Keywords: density; floor; plastic; strength; tiles; waste; water
- Developing Plant Models of Reduced Complexity by Chemical Process Engineering Way of Thinking by Varga, Mónika (2022) - Keywords: plant model, reduced complexity, stoichiometric processes, process network, supply/demand lo- gistics, natural self-control 1. 57–65 (2022) https://doi.org/10.1016/J.ENVSOFT.2014.07.009 https://doi.org/10.1016/J.ENVSOFT.2014.07.009 https://doi.org/10.1051/agro:19980501 https://doi.org/10.1016/j.envsoft.2014.09.006 https://doi.org/10.1016/j.envsoft.2014.09.006 https://doi.org/10.3390/su11082293 https://doi.org/10.1016/J.ENVSOFT.2014.07.010 https://doi.org/10.1016/J.ENVSOFT.2014.07.010 https://doi.org/10.1007/978-3-030-84152-2_11 https://doi.org/10.1016/j.ecoleng.2006.09.017 https://phyllis.nl/ https://doi.org/10.1021/ie000511u https://doi.org/10.1016/j.biosystems.2016.12.005 https://doi.org/10.1016/j.biosystems.2016.12.005 https://doi.org/10.1016/J.ECOLMODEL.2017.09.014 https://doi.org/10.1016/J.AQUAENG.2020.102073 https://doi.org/10.1016/j.envsoft.2020.104755 https://doi.org/10.1016/j.envsoft.2020.104755 https://doi.org/10.1007/3-540-10001-6_21 https://doi.org/10.1016/J.COSREV.2017.03.001 https://doi.org/10.1016/J.COSREV.2017.03.001 https://doi.org/10.17632/nw3cjv75j5.1 Introduction Challenges and objective Materials and methods Data and calculation formulae for a typical example of a plant to be modelled Non-conventional methodology of Programmable Process Structures Results and discussion Chemical process engineering-inspired principles and hypotheses of plant models Structure of the investigated process system Solar radiation-driven ``natural supply logistics'' of plant biomass generation Solar energy-driven ``natural demand logistics'' of water and nutrient uptake Generation and simulation of the PPS model Conclusion Keywords: biomass; crop; doi; elements; evapotranspiration; model; plant; process; radiation; solar; state; systems; water
- Full Issue by none (2023) - CyTA - Journal of Food, 2018, 16(1), 1131-1138 DOI: 10.1080/19476337.2018.1517828 50 pp. Total Environ., 2020, 728, 138764 DOI: 10.1016/j.scitotenv.2020.138764 [4] Medema, G.; Heijnen, L.; Elsinga, G.; Itali- aander, R.; Brouwer, A.: Keywords: acid; activity; analysis; antioxidant; biomass; case; chemical; chemistry; co2; concentration; conditions; cov-2; culture; data; degradation; doi; effect; elements; engineering; enzyme; fig; figure; gas; growth; humic; hungarian; industry; journal; kinetics; membrane; methods; model; module; morpholine; parameters; pathway; plant; plastic; presence; pressure; process; production; properties; reaction; reactor; results; samples; sars; separation; soil; state; substances; substrate; system; table; tiles; unit; water
- Full Issue by authors (2022) - [13] Silva, J. S.; Mendes, J. S.; Correia, J. A. C.; Rocha, M. V. P.; Micoli, L.: Cashew apple bagasse as new feedstock for the hydrogen production using dark fermentation process, J. Biotechnol., 2018, 286, 71–78, DOI: 10.1016/j.jbiotec.2018.09.004 [14] Saidi, R.; Liebgott, P. P.; Gannoun, H.; Gaida, L. B.; Miladi, B.; Hamdi, M.; Bouallagui, H.; Auria, R.: 1–6 (2022) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2022-10 Separation of Fumaric and Maleic Acid Crystals from the Industrial Wastewater of Maleic Anhydride Production Edisa Papraćanin1, Abdel Đozić2, Ermin Mujkić3, Maida Hodžić3, Irma Hodžić1, Belmin Poljić1 and Ajla Ramić1 1Department of Chemical Engineering, Faculty of Technology, University of Tuzla, Urfeta Vejzagića br. Keywords: acid; adsorption; anaerobic; analysis; ch4; chemical; chemistry; co2; coating; concentration; conditions; corrosion; degree; doi; effect; erythritol; essential; fermentation; figure; flow; flow rate; gas; glucose; growth; hungarian; industry; journal; liquid; maleic; manure; membrane; method; network; oils; particles; pla; plant; polyaspartic; process; production; properties; pyrolysis; rate; recovery; research; results; soil; steel; stream; study; surface; temperature; waste; water; yield
- Self-Diffusion Coefficient of Water in the Presence of Alkali Halide Ions by Baranyai, András (2023) - Since small ions strongly attract water molecules, the energy density corresponds to a high-pressure state where the self-diffusion and viscosity exhibit the behavior of a normal compressed liquid with a lower degree of transport. The degrees of coordination of water molecules to F-, Cl-, Keywords: charge; coefficient; diffusion; ions; model; polarization; results; self; water
- A Critical Review of the Photocatalytic Degradation of Pharmaceutical Residues by a TiO₂-Based Photocatalyst by Adnan Abdullah, Thamer ; Al-Obaidi, Qusay; A. Abdulla, Thaer; T. Rasheed, Rashed; Al-Azawi, Khalda; Meharban, Faiza (2024) - Mechanisms of TiO2 photocatalysis for the degradation of organic compounds The mechanism of photocatalytic activities using TiO2 as a photocatalyst has been covered in a number of studies. Some of these factors affecting TiO2 photocatalysis include its specific surface area, crystal phase, crystallite size and crystallinity. Keywords: activity; degradation; doi; efficiency; energy; light; pharmaceutical; photocatalysis; pollutants; removal; species; surface; tio2; tio2 photocatalysis; water
- An Innovative Approach to Various Industrial Applications: The Fingered Citron by Tasbasi, Hılal; Asan-Ozusaglam, Meltem (2024) - In our study, the FCLWE exhibited a similar level of antimicrobial activity on S. aureus ATCC 25923 (11.57 mm). [7] Vaou, N.; Stavropoulou, E.; Voidarou, C.; Tsigalou, C.; Bezirtzoglou, E.: Towards advances in medicinal plant antimicrobial activity: A review study on challenges and future perspectives, Microorganisms, 2021, 9(10), 2041, DOI: 10.3390/microorganisms9102041 [8] Saranraj, P.; Sivasakthi, S.: Medicinal plants and its antimicrobial properties: A review, Glob. Keywords: activity; atcc; cream; doi; fclwe; fermentum; inhibition; mic; spf; values; water
- Membrane Reactors in Photocatalytic Processes by Bélafi-Bakó, Katalin; Tóth, Gábor (2024) - When photocatalytic oxidation is integrated with membrane separation, photocatalytic membrane reactors (PMRs) can be assembled. Photocatalytic membrane reactors Membrane filtration techniques have been applied in PMRs to separate and recover the photocatalytic particles Keywords: doi; membrane; photocatalysis; process; processes; reactor; techniques; water
- Evaluation of Experiences over the Eight-Year-Long Operation of the Ultrafilter Setup Constructed for the Protection of Drinking Water in Miskolc by Hárs, Lilla; Rácz, Gábor; Lakner, Gábor; Lakner, József; Nemestóthy, Nándor (2024) - [12] Lee, Y.-G.; Shin, J.; Kim, S.J.; Cho, K.H.; Westerhoff, P.; Rho, H.; Chon, K.: An autopsy study of hollow fiber and multibore ultrafiltration membranes from a pilot-scale ultra high-recovery filtration system for surface water treatment, Sci. Given that one of the most critical problems is the lack of drinking water, people in these regions are supplied with surface water which contains a significant number of https://doi.org/10.33927/hjic-2024-16 mailto:hars.l@hidrofilt.hu HÁRS, RÁCZ, G. LAKNER, J. LAKNER AND NEMESTÓTHY Hungarian Journal of Industry and Chemistry 30 microorganisms that can cause several diseases. Keywords: doi; drinking; karst; membrane; permeability; surface; treatment; ultrafiltration; water
- Comprehensive Techno-Economic Assessment and Process Simulation of Bioethanol Production from Rice Straw Via Subcritical Water Pretreatment and Enzymatic Hydrolysis by Mustafa, Ahmad; Nassar, Hussein N.; Sadek, M. Shaaban; Ismail, Abdallah R.; Kutlu, Ozben; Tonova, Konstantza; Mussagy, Cassamo U.; Ali, Basma A.; Elshamakh, Yasmin (2025) - Typically, when estimating project costs, a 5-year recovery period is commonly assumed, factoring in the depreciation expenses and analyzing the cash flow. [36] Muharja, M.; Widjaja, A.; Darmayanti, R.F.; Fadhilah, N.; Airlangga, B.; Halim, A.; Fadilah, S.N.; Arimbawa, I.M.: Subcritical water process for reducing sugar production from biomass: Optimization and kinetics, Bull. Keywords: bioethanol; biomass; conversion; costs; doi; ethanol; glucose; h2o; hydrolysis; investment; mass; model; plant; pretreatment; process; production; project; rate; rice; rice straw; straw; temperature; time; value; water
- Preliminary Evaluation of Diclofenac Gel and Emulgel Formulated using Bentonite as a Gelling Agent by Ouamrouche, Amal; Benmounah, Abdelbaki; Benyounes, Khaled (2025) - Keywords: bentonite, formulation, gel, emulgel, rheology, diclofenac 1. [10] Manian, M.; Jain, P.; Vora, D.; Banga, A.K.: Formulation and evaluation of the in vitro performance of topical dermatological products containing diclofenac sodium, Pharmaceutics, 2022, 14(9), 1892, DOI: 10.3390/pharmaceutics14091892 [11] Pakhare, A.V.; Deshmane, S.V.; Deshmane, S.S.; Biyani, K.R.: Keywords: bentonite; doi; drug; emulgel; formulations; gel; properties; shear; water
- Possibilities of Recycling End-of-Life Ro Membrane Modules as a Low-Cost Alternative to Water Treatment by Deme, Girma; Bóna, Áron; Galambos, Ildikó (2025) - Once RO membranes used in seawater desalination reach their relatively short lifespan (5-10 years), they become end-of-life reverse osmosis (EoL RO) waste, which is ultimately disposed of through landfilling or incineration [6]. Specifically, the main method involves partly or completely removing the selective layer of RO membranes by often utilizing chemicals such as KMnO4 Keywords: doi; end; life; membranes; osmosis; reverse; treatment; water
- Valorization of Biomass-Derived Low-Cost Adsorbents for Sustainable Pesticide Remediation from Aqueous Solutions: A Comparative Study by Genet, Melkamu Birlie; Kovács, Nikoletta; Tombácz, Etelka; Maász, Gábor (2025) - Atrazine Imidacloprid Metolachlor Tebuconazole R em o v al e ff ic ie n cy [ % ] (b) Ground branches GENET, KOVÁCS, TOMBÁCZ AND MAÁSZ Hungarian Journal of Industry and Chemistry 58 exhibited low pesticide removal efficiencies with the exception of untreated ground branches, which resulted in a notable 75.08% removal efficiency for tebuconazole. The utilization of agricultural wastes as adsorbents for pesticide removal presents a viable and advantageous alternative as it adds value to these waste materials while leveraging an abundant, low-cost raw resource. Keywords: acid; adsorbents; branches; citric; ground; pesticide; removal; straw; water; wheat
- Green Synthesis of Carbon Quantum Dots Derived from Orange Peel for High-Sensitivity pH Biosensing by Tawade, Ayush; Thakre, Ashwini; Ravikumar, C.; Shende, Diwakar; Wasewar, Kailas (2025) - Keywords: carbon quantum dots, orange peel, green synthesis, pH biosensor, microwave- assisted synthesis 1. Microwave-assisted synthesis with the NuWav-Pro creates carbon quantum dots (CQDs) through microwave-induced dielectric heating, where polar substances (such as water, citric acid and urea) absorb microwave energy, generating heat quickly that breaks chemical bonds and initiates carbonization into nanometer-sized graphitic cores with fluorescent surface characteristics. Keywords: applications; carbon; cqds; doi; dots; hydrothermal; microwave; orange; peel; quantum; synthesis; water
- Enzymatic Esterification of Lactic Acid under Microwave Conditions in Ionic Liquids by Major, B.; Nemestóthy, N.; Gubicza, L.; Bélafi-Bakó, K. (2008) - The monitoring wave-length was 215 nm. Results and discussion Experiments using organic solvents For comparison of the results in ILs reactions were carried out in organic solvents. [16] straight-chain 2-hydroxy acids are highly reactive in esterification reactions with 1-butanol using 5000 mg Candida rugosa enzyme/mmol LA, while according to From et al. Keywords: acid; cyphos; enzyme; microwave; reaction; water; yield
- Mass Transfer Characteristics of Isopropanol Pervaporative Dehydration through CMC-CA-01 Membrane by Takács, L.; Vatai, Gy. (2008) - The characteristic of pervaporation membrane can be evaluated from the view of capacity/permeability and the separation efficiency of the membrane. Figure 6: Pervaporation separation index of water as a function of feed at different temperatures Conclusion Keywords: component; concentration; feed; mass; membrane; pervaporation; process; separation; transfer; water
- Towards Sustainable Water Usage in a Beverage Plant by Tokos, H.; Novak-Pintariè, Z. (2008) - Where: UB, W LB, W fw,n fw,nm , m – upper and lower bounds for water mass from freshwater source fw to operation n, t UB, W LB, W ww,n ww,nm , m – upper and lower bounds for water mass from continuous water source ww to operation n, t UB, PP LB, PP n,nc n,ncm , m – upper and lower bounds for re-used water mass from operation n to operation nc, t UB, OUT LB, OUT n nm , m – upper and lower bounds for wastewater mass from operation n to discharge, t W fw,nY – binary variable for the existence or non existence of water mass from freshwater source fw to operation n W ww,nY – binary variable for the existence or non- existence of water mass from continuous water source ww to operation n 127 PP n,ncY – binary variable for re-used water mass from operation n to operation nc OUT nY – binary variable for wastewater mass from operation n to discharge. ( ) ( )( ) ANALL OHY WSEWW ,Obj FCT t PttqPmF n n ww j wwjJww fw n fwnfw ⋅⎟⎟ ⎠ ⎞ ⎜⎜ ⎝ ⎛ + ⎥ ⎥ ⎦ ⎤ ⎢ ⎢ ⎣ ⎡ ⋅−⋅+⋅= ∑ ∑∑∑∑ Δ λ (20) Where: FObj – objective function, £/a W fwP – price of freshwater source fw, £/t W wwP – price of continuous water source ww, £/t λOHY – annual operating time, h/a ALLtΔ – overall time interval, h FAN – annualization factor. Keywords: batch; mass; operation; storage; tank; use; water
- Comparison of Physical and Chemical Measurements of Séd Stream in Veszprém and Holt-Sebes-Körös together with Sebes-Körös in Békés by Kovács, Zs.; Szalkay, Cs.; Zsilák, Z.; Rédey, Á. (2010) - The most significant purpose of the project is to define water quality of Séd and Holt-Sebes-Körös just as Sebes-Körös. At selection of the sampling sites the following direct pollution sources have been taken into consideration: 20 sampling site and 7 polluted locations were appointed along the stream that have strong effect to water quality. Keywords: concentration; körös; o ut; séd; water
- Comparative Assessment of the Mussel Micronucleus Test Versus Bacterial Bioassays for Genotoxicity Testing of Benzo[a]pyrene by Eck-Varanka, Bettina; Horváth, Eszter; Ferincz, Árpád; Paulovits, Gábor; Kováts, Nóra (2014) - Ideal concentration-response graphs were found for the MN test and the S9 supplemented Ames test. [32] MOUCHET F., GAUTHIER T.L., MAILHES C., JOURDAIN M.J., FERRIER V., TRIFFAULT G., DEVAUXE A.: Biomonitoring of the genotoxic potential of aqueous extracts of soils and bottom ash resulting from municipal solid waste incineration, using the comet and micronucleus tests on amphibian (Xenopus laevis) larvae and bacterial assays (Mutatox® and Ames tests), Sci. Keywords: ames; b[a]p; chromotest; concentration; control; dm-3; genotoxicity; micronucleus; mutation; response; sos; test; water
- Application of Online and Laboratory Methods for the Investigation of Surface Waters by Bobek, Janka; Kovács, Zsófia; Zsilák, Zoltán (2014) - Emission spectra taken with fluorimeter Table 4: Monthly average values for water quality parameters August September October pH 7.64 7.45 7.43 Conductivity, µS cm-1 711.22 707.16 720.74 Oxygen saturation, % 84.15 93.4 77.32 Dissolved oxygen, mg dm-3 9.39 10.28 8.73 NH4 +-N, µg dm-3 33 31 26 NO2 --N, µg dm-3 31 17 15 NO3 --N, mg dm-3 5.12 4.02 4.14 PO4 3--P, µg dm-3 113.79 96.58 92.04 18 water qualification in the observed timeframe in monthly divisions. We have prepared Table 2: Devices used to measure physical and chemical properties of water samples Mobile Monitoring Station 1 Mobile Monitoring Station 2 Laboratory pH NEOTEK- PONSEL, PHEHT SENTEK PI11 Consort C902 conductivity NEOTEK- PONSEL, C4E Endress+Hauser InduMaxP CLS 50 Consort C902 turbidity NEOTEK- PONSEL, NTU sensor Endress+Hauser TurbiMax W CUS41/CUS41- W - PO4 3--P - µMAC C Lovibond PC Spectro NH4 +-N NO3 --N NO2 --N PAH Trios, eviroFlu- HC - - Figure 10: The effect of the city of Veszprém on the investigated section of Séd creek Table 3: Comparison of laboratory and online measurement results EnviroFlu (µg dm-3) Laboratory (µg dm-3) sample form Séd 13.01 0.13 Séd + 20 µg dm-3 PAH mix 25.27 13.7 Séd +100 µg dm-3 naphtaline-disulphonate 21.03 0.15 Figure 11: Keywords: concentration; dm-3; laboratory; mobile; monitoring; results; station; séd; water
- Effects of Ultrasonic Disintegration, Hot-Compressed Liquid Water Pre-Treatment, and Steam Explosion on Solvolysis and Digestibility Of Grain Sorghum Stover by Capári, Dániel; Dallos, András (2014) - The comparison of the pre-treatment results of the chemical analysis, the SCOD concentration, and pH changes of grain sorghum stover slurries suggested that the most effective disintegration method is the steam explosion to disrupt the lignocellulosic structure of grain sorghum stover and partial hydrolysis of it molecular components. This study is focused on hot- compressed liquid water, steam explosion and ultrasonic pre-treatments of grain sorghum stover. Keywords: biogas; corn; explosion; grain; grain sorghum; pre; production; scod; sorghum; sorghum stover; steam; stover; time; treatment; water
- Downloadable Full Issue by , (2014) - 84 [12] ENDELE R., HALÁSZ I., UNGER K.: Influence of the particle size (5-35 µm) of spherical silica on column efficiency in HPLC, J. Chromatogr., 1974, 99, 377–393 [13] DEWAELE C., VERZELE M.: Influence of the particle size distribution of the packing material in reversed-phase high-performance liquid chromatography, J. Chromatogr., 1983, 260, 13–21 [14] BILLEN J., GUILLARME D., RUDAZ S., VEUTHEY J.L., RITCHIE H., GRADY B., DESMET G.: Keywords: abs; agent; biogas; case; chemical; cnt; components; composites; concentration; core; coupling; crn; dm-3; effect; efficiency; explosion; figure; grain; hungarian; hungary; identification; laboratory; ldpe; materials; method; models; modulus; monitoring; mpa; pannonia; parameters; particle; pet; polymer; pre; presence; production; properties; reaction; results; samples; shell; size; sorghum; steam; steps; stover; strength; structure; surface; system; table; tensile; test; time; treatment; university; values; veszprém; waste; water; work
- Effects of Surfactants on the Aggregate Stability of Soils by Miókovics, E.; Széplábi, G.; Makó, A.; Hernádi, H.; Hermann, T. (2011) - Finally, the weight of soil samples were measured again (drying 2) and the percentage of the stable aggregates (SAS) was calculated according to the Eq 1. 100 20 21 ⋅ − − = mm mmSAS (1) where: m1 – weight of the soil sample after the first drying (g), m2 – weight of the soil sample after the second drying (g), m0 – weight of the originally used dry soil sample (g). Secondly the aggregate stability measurements were performed with soil samples which were previously soaked in distilled water or surfactant solution for two days. Keywords: aggregate; case; concentration; sample; sieving; soil; stability; surfactant; water
- Examination Possibilities of Waste Water Purification Originate from Animal Waste Process by Gulyás, G.; Kárpáti, Á. (2011) - Since organic components rate 1st reactor 2nd reactor 3rd reactor 4th reactor 1st reactor 2nd reactor 3rd reactor 4th reactor N itr at e (m g/ l) A m m on iu m (m g/ l) 204 is low comparing to nitrogen compounds and most of easily splitting organic substances are transformed during airing, denitrification would not happen because of missing nutrients. Figure 1: Purification reactors The complete process does not only consist of one intake, stirring, airing, decantation and pumping. Keywords: ammonium; concentration; purification; reactor; waste; water
- Heavy Metal Contamination Assessment and its Environmental Impact in the Area of Rural Waste Disposals in Cluj County,Romania by Popiţa, G.; Varga, I.; Modoi, C.; Haţegan, R.; Popovici, A. (2011) - Regarding the water quality, it was found, as in the case of soil pollution with heavy metals, that the surface waters, in both areas have exhibited serious impact of heavy metal pollution. Regarding the classification of the land use, the transfer of heavy metal pollution was studied into the surface water. Keywords: area; concentrations; disposal; metals; samples; soil; waste; waste disposal; water
- The Region of Sebes-Körös and Holt-Sebes-Körös as Sample Areas of the Water Framework Directive by Szalkay, Cs. (2011) - The competent Hungarian authorities started to examine the exact factors of the balanced ecological systems of the wetlands and the freshwater ecosystems and they according to the instructions of the WDF in Hungary marked out for a reference areas just as Körös. The region of Körös is found in the south-east border of Hungary (Fig. 1). Keywords: concentration; fig; figure; holt; körös; sebes; water
- Properties of diesel-alcohol blends by Hajba, L.; Eller, Z.; Nagy, E.; Hancsók, J. (2011) - Reducing aromatic content of diesel fuels influences the miscibility of ethanol in diesel fuel and it affects the amount of additive required to achieve a stable blend. Ethanol– diesel fuel blends – a review, Biores. Keywords: blends; butanol; content; diesel; ethanol; fuel; water
- Asymmetric lactic acid esterification with biocatalysts in ionic liquid by Németh, G.; Bélafi-Bak, K.; Nemestóthy, N.; Gubicza, L. (2011) - Previous report [30] shows that Cyphos 104 and Cyphos 202 were suitable solvents for lactic acid esterification with high ester yield. The product of esterification with low carbon chain alcohols has higher volatility than lactic acid (LA) itself, therefore it can be more effectively separated. Keywords: acid; alcohol; candida; content; cyphos; enantioselectivity; enzymes; esterification; excess; lipase; reaction; water
- Downloadable Full 2014 Issue by , (2014) - x : ↵ p �x�1 y : � p �y�1 ✓ : �✓�1 ↵ : �↵�1 � : ↵��1 � : � p ���1✏�1, y��1✏�1, ���1✏�1, x���1✏�1, y��1��1/2✏�1, ↵��1✏�1, y↵��1✏�1, x��1��1/2✏�1 � : ↵��1/2, x��1, x↵��1/2, x2��1, ���1/2, y��1, y���1/2, y2��1 ✏ : ↵✏�1, x↵✏�1, x✏�1��1/2, x2✏�1��1/2, �✏�1, y�✏�1, y✏�1��1/2, y2✏�1��1/2, (25) The QP system Eq.(21-24) can obtain the GLV form in- variants with the help of monomials. ˙✓ = ✓ ✓ Kh� ✓ �Kh ◆ ↵̇ = ↵ ✓ �� ↵ ◆ ˙� = � ✓ ↵ � ◆ (21) �̇ = �· ⇣ � 2Kv� p � �✏ + Kvy �✏ �Kvxg� �✏ + Keywords: = �; abs; algorithm; analysis; application; average; biogas; case; cell; chemical; chemistry; cnt; complex; components; composites; concentration; control; core; coupling; crn; data; design; device; difference; distribution; dm-3; effect; efficiency; egyetem; energy; engineering; error; estimation; feedback; figure; following; form; function; grain; graph; hungarian; hungary; hydrogen; identification; kinetic; laboratory; ldpe; linear; materials; matrix; measurements; method; mobile; model; monitoring; mpa; network; new; number; order; p �; pannonia; parameters; particle; pet; phase; point; power; pre; process; production; properties; rate; reaction; research; results; s �; samples; set; simulation; size; sorghum; state; steam; steps; stover; strength; structure; study; surface; system; table; tensile; test; time; treatment; university; values; veszprém; waste; water; y �; ↵ �; ✏ �; � d; � qs; � r; � t; � �
- Editorial Preface by , (2015) - In this Thematic Issue of the Hungarian Journal of Industry and Chemistry, selected papers are presented from the Conference program that represent some of the important topics of the water sector: e.g. heavy metal removal from waste water and monitoring the bioavailability of heavy metals in river catchment areas; nitrogen removal from municipal waste water; mineralisation of herbicides in water; equilibrium calculations to solve complex aqueous speciation problems; photocatalytic remediation of pesticide-contaminated ground water; purification of dairy-food waste water via biofilms, and novel plasma spectroscopic methods in the analysis of aqueous solution. Although water is available in vast quantities on Earth, the amount of fresh water is only approximately 3% of the total. Keywords: issue; water
- Groundwater Remediation Using Biological and Photocatalytic Methods by Guba, Sándor; Somogyi, Viola; Szabóné Bárdos, Erzsébet (2015) - [2] Solymosné Majzik, E.: Determination of concentration of pesticide active ingredients in groundwater and surface water samples applying various SPE methods, PhD thesis (University of Pannonia, Veszprém, Hungary) 2006 (in Hungarian) Keywords: heterogeneous photocatalysis, groundwater remediation, quizalofop-P-ethyl, acetamiprid, biological treatment 1. Keywords: case; concentration; dm-3; methods; photocatalysis; reactor; treatment; water
- Downloadable Full Issue by , (2015) - The technology and sampling points for checking heavy metal concentrations. The sludge reprocessing and reuse pose no problems in the plant with respect to heavy metal content. Keywords: case; chemical; chemistry; concentration; content; diuron; dm-3; doi; engineering; environmental; extraction; figure; hungarian; hungary; industry; journal; light; lines; matrix; metal; nebuliser; nitrogen; ozonation; photocatalysis; photolysis; plant; process; rate; removal; research; results; samples; sludge; soil; species; system; table; total; treatment; university; values; wastewater; wastewater treatment; water
- Adapting the Sdewes Index to Two Hungarian Cities by Sebestyén, Viktor; Somogyi, Viola; Szőke, Szandra; Utasi, Anett (2017) - ��,����� = ���,������max���,��� �min���,���max���,��� (1) ��,����� = ���,������min���,��� �max���,���min���,��� (2) Value aggregation is done according to SDEWES���� = ∑ ∑ �� � ��� ��,����� � ��� , (3) where ∑ �� = 1� ��� and αx is the weight of the xth dimension. Keywords: cities; city; co2; consumption; data; energy; hungarian; index; indicator; max �; min �; sdewes; veszprém; water; zalaegerszeg; � �
- Downloadable Full Issue by , (2017) - ��,����� = ���,������max���,��� �min���,���max���,��� (1) ��,����� = ���,������min���,��� �max���,���min���,��� (2) Value aggregation is done according to SDEWES���� = ∑ ∑ �� � ��� ��,����� � ��� , (3) where ∑ �� = 1� ��� and αx is the weight of the xth dimension. Keywords: 45(1; acid; adsorption; analysis; battery; ca2; carbon; case; catalyst; channel; charge; chemistry; cities; city; column; complexes; concentration; control; current; data; distribution; doi; effect; energy; equilibrium; figure; formation; gas; h2s; horváth; hungarian; hydrogen; index; industry; ions; journal; membranes; metal; method; mixture; model; mwcnts; parameters; phase; phys; plane; potential; process; quality; results; sample; selectivity; simulation; size; small; state; structure; surface; surface energy; system; table; temperature; terms; time; transport; treatment; type; value; veszprém; voltage; water; zeolite; � �
- Effect of Chain Length and Order of the Alcohol on Enzyme Activity During Enzymatic Esterification in Organic Media by Márkus, Zsófia; Bélafi-Bakó, Katalin; Tóth, Gábor; Nemestóthy, Nándor; Gubicza, László (2017) - Keywords: enzymatic esterification, non-conventional media, effect of alcohol chain lengths, lipase activity 1. He, C.; Yi, W.; Zhu, W.; Liu, Y.: Effect of alcohol chain length on the enzymatic resolution of racemic mandelic acid and kinetic study, Biotechnol. Keywords: acid; alcohols; chain; doi; enzyme; esterification; esters; reaction; water
- Downloadable Full Issue by , (2017) - 1–7 (2017) hjic.mk.uni-pannon.hu DOI: 10.1515/hjic-2017-0012 METHYL-TERT-BUTYL-ETHER SYNTHESIS REACTOR MODELLING AND OPTIMIZATION USING AN ASPEN CUSTOM MODELER ZEESHAN NAWAZ SABIC Technology & Innovation, PO Box 42503, Saudi Basic Industries Corporation (SABIC), Riyadh, 11551, SAUDI ARABIA A pseudo-homogeneous model of methyl-tert-butyl-ether (MTBE) synthesis in a multi-tubular packed-bed reactor has been developed using an Aspen Custom Modeler (ACM) for selecting optimum operating strategies, for the maximization and enhancement of MTBE production, and isobutylene consumption, respectively. 9–12 (2017) hjic.mk.uni-pannon.hu DOI: 10.1515/hjic-2017-0013 MODELLING THE PARTIAL DEMINERALIZATION PROCESS OF COW MILK BY SUPERPRO DESIGNER ATTILA CSIGHY,* ANDRÁS KORIS, AND GYULA VATAI Department of Food Engineering, Szent István University, Ménesi út 44, Budapest, 1118, HUNGARY Milk and dairy products contain a number of biologically active compounds (proteins, lipids, vitamins and minerals) that are essential for human nutrition. Keywords: 10.1016; acid; alcohols; carbon; chain; chem; chemistry; co2; coefficient; compounds; dairy; doi; effect; esterification; extraction; feed; figure; flow; flux; fouling; heat; hungarian; in4(p2se6)3; industry; liquid; mass; membrane; method; milk; model; mtbe; oil; parameters; phase; process; processes; production; rate; reaction; reactor; results; study; synthesis; system; table; temperature; terms; tlinp2se6; transfer; treatment; wastewater; water
- Downloadable Full Issue by , (2018) - Lipid A samples were dis- solved in methanol/dichloromethane (95:5, v/v) at a final concentration of 0.5 mg/ml. 2.3 Liquid Chromatography – Mass Spec- trometry Measurements Separation and mass spectrometric detection of lipid A samples were performed with an 1290 Infinity Ultra-high performance liquid chromatography (UHPLC) system (Agilent Technologies, Waldbronn, Germany) coupled to a 6530 Accurate-Mass Q-TOF LC/MS system (Agi- lent Technologies, Singapore), using a KinetexTM core- shell C18 column (100 mm×4.6 mm, 2.6 µm particle size, Phenomenex). Lipid A samples were dis- solved in methanol/dichloromethane (95:5, v/v) at a final concentration of 0.5 mg/ml. 2.3 Liquid Chromatography – Mass Spec- trometry Measurements Separation and mass spectrometric detection of lipid A samples were performed with an 1290 Infinity Ultra-high performance liquid chromatography (UHPLC) system (Agilent Technologies, Waldbronn, Germany) coupled to a 6530 Accurate-Mass Q-TOF LC/MS system (Agi- lent Technologies, Singapore), using a KinetexTM core- shell C18 column (100 mm×4.6 mm, 2.6 µm particle size, Phenomenex). Keywords: acid; analysis; breath; chemistry; chromatography; column; compounds; concentration; condensate; czech; detection; determination; doi; ebc; ebc samples; electrophoresis; fig; figure; glutathione; gsh; hplc; hungarian; industry; ionization; ions; journal; lipid; mass; mode; modification; ms analysis; phase; phosphorylation; plasma; reflux; republic; samples; separation; silica; species; spectrometry; substrate; surface; technique; university; water
- Monitoring of Chemical Changes in Red Lentil Seeds During the Germination Process by Szedljak, Ildikó; Kovács, Anikó; Kun-Farkas, Gabriella; Bernhardt, Botond; Králik, Szabina; Szántai-Kőhegyi, Katalin (2018) - The effect of heat treatment on the amounts of certain components and the activity of oxidative enzymes was tested during our experiments; the nutritional characteristics (water-soluble total polyphenol content (WSTPC), water- soluble protein content (WSPC), water-soluble antioxidant capacity, in addition to peroxidase and polyphenol oxidase enzyme activities) of different treatments in red lentil samples were monitored. Germination resulted in the water-soluble antioxidant capacity of red lentil samples decreasing. Keywords: activity; antioxidant; doi; food; germination; lentil; red; samples; water
- Effects of Different Heat Treatments on the Chemical and Microbiological Characteristics of Egg-free and Quail Egg Dried Pasta by Szedljak, Ildikó; Tóth, Viktória; Tormási, Judit; Kovács, Anikó; Somogyi, László; Sipos, László; Kiskó, Gabriella (2018) - Quail egg pasta (Coturnix coturnix) is one of these innovations. Since the chemical and microbiological character- istics of quail egg pasta, according to the literature, have yet to be studied in depth, our goal was to expand this knowledge. Keywords: activity; content; egg; heat; pasta; quail; samples; water
- Downloadable Full Issue by , (2018) - [21] Galeazzi, M. A. M.; Sgarbieri, V. C.; Costantinides, S. M.: Isolation, purification and physiochemical characterization of polyphenoloxidases (PPO) from dwarf variety of banana (Musa Cavendishii, L.). Surface chemical and nanomechanical properties, Materials Science Forum, 2007 537, 255-262 DOI: 10.4028/www.scientific.net/MSF.537-538.255 Keywords: 46(2; acid; activity; algae; analysis; antioxidant; buffer; capacity; case; chemical; chemistry; conditions; content; control; conveyor; corrosion; data; design; difference; distribution; doi; effect; egg; enzyme; factors; fat; field; fig; figure; flour; following; food; friction; function; heat; hungarian; industry; journal; material; matrix; measurements; method; model; number; oil; oils; operator; parameters; particles; plasma; polymer; probability; process; production; products; properties; rate; reachability; reaction; results; samples; simulation; study; surface; susceptibility; swelling; system; table; tank; temperature; terms; test; time; treatment; values; water; wear
- Analysis of Crude Oil in Terms of Fouling and Corrosion by Katona, Richárd; Lócskai, Roland; Bátor, Gergő; Krójer, Antal; Kovács, Tibor (2019) - In this study, analytical methods were developed to investigate the effect of crude oils on production in terms of fouling and corrosion, which can be used to characterize crude oil from different sources. In the case of changing crude slates, predicting the impacts of crude oil on production is necessary to ensure safe and profitable processing. Keywords: asphaltene; compatibility; content; corrosion; emulsification; fouling; oil; oils; tendency; water
- Immobilization of Laccase in Alginate Beads by Varga, Béla; Meiczinger, Mónika; Somogyi, Viola (2019) - Properties such as simple production, easy reten- tion and biodegradable carrier material are advantageous, e.g. entrapping laccase in alginate beads. 2.5 Effect of temperature on alginate beads In order to gather information regarding the effect of tem- perature on enzyme activity within the optimal temper- ature range of wastewater treatment plants [27], the re- action rate of the ABTS transformation was determined inside a thermostatic cabinet (20− 35 °C). Keywords: abts; activity; alginate; beads; doi; enzyme; immobilization; laccase; solution; water
- Multistage Gravity Beneficiation of Rutile in a Tar-Free Sand Residue by Akande, Rukayat; Adeleke, Abraham (2019) - This study reports on the concentration of rutile in the sand recovered from tar sand in Ondo State in Nigeria. Keywords: Tar sand, rutile, panning, shaking table, pre-concentrate, concentrate 1. Keywords: concentrate; residue; rutile; sample; sand; shaking; table; tar sand; water
- Downloadable Full Issue by , (2019) - 1–4 (2019) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2019-13 INVESTIGATIONS INTO SUCCINIC ACID FERMENTATION ÁRON NÉMETH *1 1Department of Applied Biotechnology and Food Science, Budapest University of Technology and Economics, Műegyetem rkp. DOI: 10.2225/vol13-issue4-fulltext-6 [10] Bonilha, P. R. M.; Menocci, V.; Goulart, A. J.; Polizeli, M. L. T. M.; Monti, R.: Cyclodextrin gly- cosyltransferase from Bacillus licheniformis: Opti- mization of production and its properties Braz. Keywords: 47(2; acid; activity; alginate; analysis; beads; biocomponent; bitumen; case; cgtase; change; chemistry; concentration; contact; content; data; diameter; doi; effect; elements; energy; enzyme; fermentation; fig; figure; fitting; flow; function; gas; hungarian; hydrogen; industry; journal; laccase; mass; materials; method; mixing; model; number; oil; oils; order; outflow; parameters; particles; phase; process; production; properties; prototypes; rate; results; rotary; rtd; samples; sand; silo; simulation; solution; speed; state; structure; supply; system; table; test; time; transfer; unit; valve; volume; water
- Novel Particle Engineering Techniques in Drug Delivery: Review of Coformulations Using Supercritical Fluids and Liquefied Gases by Majerik, V.; Horváth, G.; Charbit, G.; Badens, E.; Szokonya, L.; Bosc, N.; Teillaud, E. (2004) - Godinas et al. invented a process wherein an active principle together with a surface modifier is dissolved in a dense gas which is afterwards expanded in an aqueous solution containing a second – optionally, identical to the first – surface modifier and other additives [15]. [72] Mannitol Mixture of drug particles and polymer fibers, 1 - 20 µm Model drugc Eudragit E Solid solution Keywords: drug; gas; method; nozzle; particles; pat; pla; polymer; process; size; solution; solvent; water
- WATER TEMPERATURE DISTRIBUTION IN A VERTICAL CROSS-SECTION OF A WET COUNTERFLOW COOLING TOWER by Škobalj, D.; Zavargó, Z.; Juhász, L. (2002) - WATER TEMPERATURE DISTRIBUTION IN A VERTICAL CROSS-SECTION OF A WET COUNTERFLOW COOLING TOWER D. SKOBALJ, Z. ZAVARG6 1 and L. JuHAsz1 ( Vujic-Valjevo, Alekse Dundica 61/1, 14000 Valjevo, YU 1Faculty of Technology, University of Novi Sad, Bul. The first theorethical formulation of water cooling in the counter cooling towers was given by Walker et al. Keywords: cooling; fill; temperature; water
- THE INFLUENCE OF WATER CONCENTRATION ON THE CORROSION OF LOW ALLOY STEELS IN THE SYSTEM METHANOL – ETHYLENE GLYCOL – ACETIC ACID by Sutiman, D.; Vizitiu, M. (2002) - The behaviour of three types of steel with a variable carbon content (from 0.2 to 0.4%) is studied in medium of methanol - 10% ethylene glycol - 5% acetic acid with water concentration between 1% to 5%. for every value of water concentration. Keywords: concentration; corrosion; h20; system; water
- THE INFLUENCE OF WATER CONCENTRATION ON THE CORROSION OF LOW ALLOY STEELS IN THE SYSTEM METHANOL – ETHYLENE GLYCOL – n-BUTIRIC ACID by Sutiman, D.; Cailean, V. (2002) - The behaviour of three types of steel with a variable carbon content (from 0,2 to 0,4 % ) is studied in medium of methanol- 10% ethylene glycol- 5% n-butiric acid with water concentration between 1% to 5 % . The corrosion final compounds, for every value of water concentration, were soluble in the system. Keywords: acid; butiric; concentration; corrosion; system; water
- Mathematical Modelling in Osmotic Dehydration by Matusek, A.; Czukor, B.; Mérész, P.; Örsi, F. (2005) - The correlation analysis for measured and calculated values gives higher coefficient for water diffusion regarding to the better deviation attribute of the moisture determination, but the deviation attribute of the refraction is lower, as higher the standard error of prediction (SEP). The rate of mass transport depends upon many factors such as concentration, temperature and the kind of osmotic solution, time of treatment, level of agitation, sample-to-solution ratio, vacuum level and different pre-treatments if applied. Keywords: concentration; dehydration; diffusion; solution; time; water
- CHARACTERIZATION OF GEL CONCENTRATION IN ULTRAFILTRATION OF OIL-IN-WATER EMULSION by Hu, X.; Békássy-Molnár, E.; Vatai, G. (2002) - The model includes the following influence factors: transmembrane pressure, feed concentration, mass transfer coefficient, membrane resistance and so on. Evaluation of Experimental Results Calculations of membrane resistance and gel layer resistance As an example, Fig.2, which plotted the flux with time for different UF membranes f 4 ], was selected to characterize the relationship between liJw and V. The operating pressure is 3 bar, the oil-in-water emulsion concentration is 0.5 vol. Keywords: concentration; flux; gel; layer; membrane; permeate; pressure; water
- THE SIMULATION OF CLUSTER FORMATION PROCESS IN FINE PARTICLES DISPERSION UNDER THE INFLUENCE OF EXTERNAL MAGNETIC FIELD by Pristovnik, A.; Lipuš , L. Č.; Krope , A.; Krope , J. (2002) - PRJSTOVNIK A. J.: Configuration and formation of clusters from dispersion particles during the magnetic water treatment, Draft of Doctoral Dissertation, University of Maribor, Faculty of Chemistry and Chemical Engineering, unpublished work, 2001 9. IOVCHEV M.: The Effect of Magnetic Field on an Iron-Oxygen Water System, Khim. The presented model is based on the Monte Carlo Metropolis [4,13] method and bas been used to investigate the properties of colloid particle dispersion in water under the influence of magnetic field [:2,3,5,6,7]. Keywords: cluster; dispersion; energy; field; particles; water
- EFFECT OF COATING ON THE FLOW, WETTING AND DISSOLUTION FOR DIMENHYDRINATE CRYSTALS by Bajdik , J.; Pintye-Hódi, K.; Regdon jr., G.; Haasner , T.; Szabó-Révész, P.; Ulrich , J.; Erős , I. (2002) - Crystal coating with a suitably quantity of polymer can be more useful for crystal preparation for tabletting than crystal agglomeration because the polymer coating provides additional possibilities to influence positively the disadvantageous properties of the materials (light, moisture and oxygen sensitivity, or a very unpleasant odour and taste). Conclusion The coating of dimenhydrinate crystals improved the low-flow properties of the original particles. Keywords: coating; crystals; dimenhydrinate; dissolution; film; particles; polymer; sample; time; water
System
- Model Predictive Control of Continuous Crystallizers by Moldoványi, N.; Lakatos, B. G. (2005) - For the crystallizer we have two outputs and two inputs, there are three possible pairs of control variables, so three different relative-gain arrays can be formed and computed (The value 0 and 1 are rounded.): (60) wuyu in ==== 6251 , ϑϑ An optimization algorithm will be applied to com- pute a sequence of future control signals that minimizes the cost function. Keywords: control; crystallizer; model; system; − −; ⎢ ⎢; ⎥ ⎥
- EQUIVALENT SYSTEM METHOD APPLIED TO MULTIVARIABLE CASCADE CONTROL OF INDUSTRIAL TUBULAR FURNACE by Abilov, A. G.; Tuzunalp, O.; Telatar, Z.; Ilk, H. G. (2002) - In this system, because the transfer function of the equivalent channels is symmetric, it is identified as, Equivalent multivariable cascade control system A block diagram of the multi variable cascade control of the equivalent system is shown in Fig.5. Finally, experimental tests of the control of temperature in industrial furnace plant using multivariable cascade equivalent control system has also verified the conclusion that equivalent system technique has considerable control performance. Keywords: cascade; control; function; furnace; system; transfer; transfer function
- EXPLOSION AREAS OF FLAMMABLE SUBSTANCES AND THEIR NUMERICAL APPROXIMATION by Viczián, G.; Molnárné-Jobbágy, M.; Heszberger, J.; Kollár-Hunek, K. (2001) - Keywords: ternary flammable systems, inerting, explosion areas, spline curves and surfaces, 2D and 3D visualisation Introduction In order to avoid explosion with flammable substances, generally applied solution in industrial processes is purging with inert gases. I Characteristic values for explosion area of ternary systems containing flammable gas I inert gas I oxidising gas Acronym in CHEMSAFE .Qescripdon Keywords: air; curves; explosion; gas; interpolation; level; system; ternary
- Follow-up Control of a Second Order System in Sliding Mode by Domonkos, Márk; Fink, Nándor (2020) - 13–21 (2020) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2020-23 FOLLOW-UP CONTROL OF A SECOND ORDER SYSTEM IN SLIDING MODE MÁRK DOMONKOS *1 AND NÁNDOR FINK1 1Department of Mechatronics, Optics and Mechanical Engineering Informatics, Budapest University of Technology and Economics, Bertalan Lajos u. 4-6, Budapest, 1111, HUNGARY This paper deals with an instantaneous feedback controlled inverter using sliding mode control. Starting from the basic theory of sliding mode control, the trajectory of the error signal is modelled. Keywords: control; doi; error; fig; figure; load; mode; system; trajectory; voltage
- The Experimental Verification of a Generalized Model of Equivalent Circuits by Lukács, Zoltán; Baccilieri, Dávid; Kristóf, Tamás (2021) - 1–8 (2021) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2021-01 THE EXPERIMENTAL VERIFICATION OF A GENERALIZED MODEL OF EQUIVALENT CIRCUITS ZOLTÁN LUKÁCS*1, DÁVID BACCILIERI1, AND TAMÁS KRISTÓF1 1Center for Natural Sciences, University of Pannonia, Egyetem u. 10, 8200 Veszprém, HUNGARY The determination of typical parameters of electrochemical systems, e.g. the polarization or charge transfer resistances, can be critical with regard to the application of Electrochemical Impedance Spectroscopy (EIS) if the lower frequency range is biased as a result of transport and/or adsorption/desorption processes. The CPE appears in all the cited works and can be regarded with a high degree of certainty as an inherent characteristic of electrochemical systems. Keywords: admittance; data; dispersion; doi; eis; electrode; frequency; impedance; method; model; range; resistance; system
- Electric Vehicle Modelling and Simulation of a Light Commercial Vehicle Using PMSM Propulsion by Babangida, Aminu; Szemes, Péter Tamás (2021) - In addition, this research determined that the fuel economy of electric vehicles is approximately 19% better than that of conventional vehicles. [1] Nowadays, electric vehicles are being developed to reduce these toxic effects and achieve safer transportation networks. Keywords: battery; control; controller; electric; energy; fig; figure; model; motor; pmsm; speed; system; vehicle
- Development of Compartment Models for Diagnostic Purposes by Tarcsay, Bálint Levente; Bárkányi, Ágnes; Chován, Tibor; Németh, Sándor (2021) - Fin,i (5) FM = nin∑ i=1 Fin,i (6) Hungarian Journal of Industry and Chemistry Development of Compartment Models for Diagnostic Purposes 49 Figure 1: Step responses of ideal flow models [14] For unit D: ~cD = ~αcin (7) ~FD = ~αFin (8) The volumetric flow rate (F ) entering and exiting the units is also provided by assuming a constant temperature and dilute solutions. In the case of chemical technologies, the flow and transport phenomena in a system can be approximated by breaking down the system into compartments that exhibit idealized flow behaviour. Keywords: behaviour; cfd; compartments; ecs; fig; flow; function; methods; model; step; system; unit; velocity
- Design of a New Chemical Injection Pump System for Gas Hydrate Inhibition by Vörös, Csaba; Füvesi, Viktor; Pintér, Ákos (2022) - Injection system from HASKEL MILTON ROY The HASKEL MILTON ROY company develops and manufactures various injection systems for special oil and gas applications for many years. In this study the main feature of chemical injection systems used in gas industry are detailed. Keywords: chemical; gas; injection; injection system; pump; system; unit
- Development of a Digital Twin for Gas Mixing in a Generator by Shypul, Olga; Garyn, Vadym; Tkachenko, Denys; Plankovskyy, Sergiy; Tryfonov, Oleg (2023) - Introduction The incentive for developing digital twins (DT) in the process of generating gas mixtures is the digitalization of modern technologies. Keywords: digital twin, reduced order model, numerical simulation, gas mixer 1. Keywords: components; data; fuel; gas; gas mixture; mixer; mixture; model; parameters; system; twin
- Batch Analysis by Molnár, F.; Chován, T.; Szeifert, F.; Nagy, L. (2007) - References Define recipe operations Recipe formula Instrumentation list Define modes Define manipulated elements Code Process operation Parameters Process measurement Critical Important Informative Safety Process mode Required manipulating element Comments P1_1 Acetone charging 111 l acetone FIQSaceton Auto P1_2 Water charging 222 l DEMIwater FIQwater Auto P1_3 Temperature setting 20 – 25 ºC TITCAreact NTCreactor TTCjack-in TTjack-out PTSjack Auto 61 Design of procedural elements Procedural control is the most characteristic level of batch process control. Eng. , 1998, 22, 177-183 5. REAKLAITIS G. V.: Overview of scheduling and planning of batch process operations, Proc. NATO- ASI on Batch Processing Systems engineering, 1992 64 6. Keywords: analysis; batch; batch control; control; design; model; operations; process; recipe; system
- Recent Trends on Application of Ionic Liquids in Organic Synthesis by Cserjési, P.; Bélafi-Bakó, K.; Nemestóthy, N.; Gubicza, L. (2008) - The nano particle catalysts can endure forcing conditions (75 °C, 40 bar H2), resulting in high reaction rates and high conversions compared with other nano particles that operate in ILs. This gives rise to the ideal situation of high reactions rates, not impeded by phase problems, with the ideal separation properties. Keywords: catalyst; chem; hydrogenation; ils; liquids; methylimidazolium; oxidation; phase; reaction; solvent; synthesis; system
- Integration of Process Simulators in Advanced Process Control Solutions by Abonyi, J. (2009) - Hence, OPC is known for more than just its applications within process control. The specification defined a standard set of objects, interfaces and methods for use in process control and manufacturing automation applications to facilitate interoperability. Keywords: controller; crystallizer; model; opc; plant; predictive; process; simulation; system; variables
- A Nonlinear Dielectric Measurement Method for the Study of Complex Liquids by Horváth, B.; Szalai, I. (2010) - Additional adjustable parameters are the following: the amplitude and the width of the rectangular high voltage pulse, the span of the vertical display in hertz, and the number of frequency measurements to average. High voltage pulse generator A PS350 DC high voltage power supply made by Stanford Research System serves as the base of the pulse generator. Keywords: analyzer; cell; data; dielectric; frequency; measurement; oscillator; pulse; system; voltage
- Municipal Environmental-Monitoring System by Speiser, F.; Magyar, I.; Enisz, K. (2010) - On the whole it can be stated that the system is suitable for collecting environmental data with specific low costs at minimal infrastructural build-up. Figure 1: System components and connections The portal consists of two main modules: the starting page gives general information and a menu-system grouping environmental data regarding the specified area of the municipality. Keywords: air; data; environmental; information; measurements; monitoring; parameters; quality; system
- Autonomous Mapping in Polluted Environments by Szőke, I.; Majdik, A.; Lupea, D.; Tamás, L.; Lazea, Gh. (2010) - 9. C. LAUGIER, R. CHATILA: Autonomous Navigation in Dynamic Environments, Springer tracts in Advanced Robotics, 35, 2007. 10. A. LILIENTHAL, A. LOUTFI, T. DUCKETT: Airborne chemical sensing with mobile robots, Sensors, 2006. 11. D. MARTINEZ, O. ROCHEL, E. HUGHES: Environmental monitoring with mobile robots, Conference on Intelligent Robots and Systems, IROS 2005. 15. Keywords: algorithm; data; environment; feature; image; map; mapping; point; robot; system
- Automatic Robotic Assembly System in the Service of the Vehicle Industry and the Environment by Sztankovics, I. (2010) - BOSCH SR 450 SCARA type assembly robot - DESOUTTER automated screwdriver - feeding system - construction capable of switching tools - tool magazine for 3 tools c) POLY-P 42 SCARA type assembly robot - pneumatic cracking machine, d) central computer Figure 1: Sketch of the assembly system 221 Presentation of a Robot in the System The most important element of the system is the BOSCH SR SCARA 450 type robot. It has a testing opportunity with or without robot motion. Keywords: assembly; kundrák; operations; papp; proc; production; robot; system
- Two Special Cases of the Holonic Manufacturing System by Bányai, K.; Mándy, Z.; Dudás, I. (2010) - The structures and principles The holonic manufacturing system (HMS) is built up from three elemental holons: an order holon, product holon and a source holon. A holon is an autonomous, co-operative and intelligent entity able to collaborate with other holons to process tasks. Keywords: autonomy; hms; holon; information; machine; manufacturing; system
- Computer Aided Modelling of Hybrid Mini Van by Lakatos, I.; Nagy, V.; Kőrös, P.; Orbán, T. (2012) - Electric drive system and all vehicle control components (power electronics for e-motors, battery management system, etc.) were developed at the Széchenyi István University. A completely new data bus had to be constructed connecting to the existing CAN-BUS network to control the units of electric drive system (Ford data bus, power steering, e-motor bus). Keywords: drive; electric; figure; model; power; software; system; vehicle
- Downloadable Full Issue by , (2022) - Input-output event sequences Operational procedures in process systems are detailed list of instructions for the plant operator personnel to 60 perform certain operations on the plant. Component based structural decomposition The above mentioned fault diagnosis based on the P- HAZID analysis is only developed for process systems 61 Table 1: A simple example of a P-HAZID table. Keywords: activity; algorithm; analysis; capacitor; case; chemical; component; control; data; data reconciliation; energy; engineering; example; fault; figure; flatness; function; gas; graph; hungary; industrial; industry; injection; input; journal; level; line; manufacturing; matrix; measurement; method; model; number; occurrence; operation; order; output; parameters; place; power; probability; problem; process; process control; process data; process system; processes; production; reconciliation; research; resource; results; second; set; solution; state; system; table; tank; temperature; time; university; values; variables; vehicle; velocity; veszprém
- Downloadable Full Issue by , (2012) - The regenerators are long ago applied, great heat capacity heat stores with solid fill and with short charge-discharge cycle time (10–7200 s). The melt of the solar salt (60% NaNO3 + 40% KNO3) is used out of these materials in concentrated solar power plants as heat storage material (operating temperature range 260–550ºC, volumetric heat capacity ~2.84 MJ/m3K Keywords: /bicubic; /namespace; /ok; /qfactor; /quality; /vsamples; acid; acrobat; adobe; adobe pdf; adobe reader; brake; carbon; case; coating; current; data; design; discharge; documents; effects; fatigue; figure; fluid; heat; heat storage; heat transport; iec61966; material; medium; mwcnt; potential; prepress; results; rubber; source; srgb; storage; store; surface; system; temperature; tensile; time; torque; transport; type; zea
- Data Determination of an Internal Combustion Engine for Model Set-up by Lakatos, I.; Titrik, Á.; Orbán, T. (2011) - /SVE /TUR /UKR /ENU (Use these settings to create Adobe PDF documents best suited for high-quality prepress printing. (Za stvaranje Adobe PDF dokumenata najpogodnijih za visokokvalitetni ispis prije tiskanja koristite ove postavke. Keywords: engine; figure; model; system; ø54.4
- Bycicle ABS Prototype Development by Jakab, R.; Enisz, K.; Hauptmann, V.; Speiser, F.; Fodor, D. (2011) - Keywords: ABS, hydraulic brake system, bicycle Introduction Nowadays more and more efforts are taken to make the road traffic safer. The ABS control algorithm is able to run on a separate SBC (single board computer) and not only on the ECU (electronic control unit), the bicycle has hydraulic brake system and the algorithm is able to actuate both of the wheels independently but in synchronized manner. Keywords: abs; algorithm; bicycle; control; sbc; speed; system; wheel
- Determining Optimal Stock Level in Multi-Echelon Supply Chains by Király, A.; Belvárdi, G.; Abonyi, J. (2011) - The diagram shows weekly inventory levels in the Warehouses at the optimal case. 111 Weeks y Figure 8: Inventory levels in the 2-level system. Simulation is a very useful alternative for analyzing supply chain systems and a well-constructed model can provide a better approach and can give more realistic picture of the complex situation. Keywords: chain; demand; inventory; level; model; optimization; service; simulation; stock; supply; system; time
- Diagnostic Investigations Based on the Petri Net Model Generated from the Process Information by Márczi, B.; Gerzson, M.; Leitold, A. (2011) - The idea of using model structure identification and comparison of discrete event systems models [3] is not new, but the field has matured only recently by a review paper 133-139 (2011) DIAGNOSTIC INVESTIGATIONS BASED ON THE PETRI NET MODEL GENERATED FROM THE PROCESS INFORMATION B. MÁRCZI1, M. GERZSON1 , A. LEITOLD2 1University of Pannonia, Department of Electrical Engineering and Information Systems, Veszprém, HUNGARY E-mail: gerzson@almos.vein.hu 2University of Pannonia, Department of Mathematics, Veszprém, HUNGARY A novel structure comparison procedure for discrete event systems described by Petri nets are proposed in this paper for model-based diagnosis that utilizes the graph distance metric method. Keywords: event; fault; file; model; net; operation; petri; process; system
- Connection Theory of Conical Worm Gear Drives by Bodzás, S.; Dudás, I. (2011) - Figure 1: Spiroid worm gear drive The dentation of crown wheel is produced with hob which tiler surface is similar to conical worm surface. The relative velocity of the two surfaces can be determined in coordinate system K2F using the transformation between K1F (x1F, y1F, z1F) coordinate system for worm and the K2F (x2F, y2F, z2F) coordinate system for worm gear: ( ) FFFFF rM dt dr dt dv 11,22 )12( 2 rrr ⋅=⋅= (18) Keywords: coordinate; system; ⎢ ⎢; ⎢ ⎣; ⎥ ⎥; ⎥ ⎦
- On-Board Applicability of Mems-Based Autonomous Navigation System on Agricultural Aircrafts by Nádasi, P.; Szabó, I. (2011) - The utilization of the MEMS devices on-board of agricultural aircrafts is now in an early stage. The possible operators may come from USA, Ukraine, Russia and China where huge amount of agricultural aircrafts are still in service and the agricultural flights are widely used for pest control over large areas. Keywords: aircraft; crop; imu; mems; navigation; pesticide; pilot; spraying; system; wind
- Prototype of a Multi-Robot System for Autonomous Gas Mapping in Polluted Environments by Lupea, D.; Szőke, I.; Majdik, A.; Lazea, Gh. (2011) - A review of electrolyte and electrode materials for high temperature electrochemical CO2 and SO2 gas sensors, Sensors and Actuators, 134(2), (2008), 1034–1041 11. R. MOOS, N. IZU, F. RETTIG, S. REIS, W. SHIN, I. MATSUBARA: Resistive oxygen gas sensors for harsh environments, Sensors, 11(4), (2011), 3439–3465 15. Keywords: algorithm; ellipse; gas; map; robot; sensors; state; surf; system; t t; − −
- Separation of Multicomponent Mixtures by Szabó, L.; Németh, S.; Szeifert, F. (2011) - ∑ ∑ − = − = += 1 1 1 1 C i C i Copi Cinvi Csum τ (2) 65,0 65,0 65,0 65,0 14321 5000 328 280 & 11250 328 280 & 323 & i cond i i reb i i p iiiii b ii VHSM VHSM CfffNCfSMCinv ⋅⎟⎟ ⎠ ⎞ ⎜⎜ ⎝ ⎛ Δ ⋅⋅+ +⋅⎟⎟ ⎠ ⎞ ⎜⎜ ⎝ ⎛ Δ ⋅⋅+ ++⋅⋅⋅++⋅= (3) condcond i rebreb ii TPHTPHCop )()( ⋅Δ+⋅Δ= (4) where C is number of products; Csum is cost of separation system; Cinvi is investment cost of column number i; Copi is operation cost of column number i; τ is amortization time; M&S is Marshall and Swift index; ΔHi reb is reboiler duty of column number i; ΔHi cond is condenser duty of column number i; Vi is vapor rate in the column number i; P(T)reb is cost of the hot utility (depend on temperature); P(T)cond is cost of the cold 299 utility (depends on temperature); fi 1-4 factor of column number i 9 products were determined in the case study, which makes the number of possible separation systems 1430. Keywords: c b; c d; separation; system
- Development of a Vehicle-Dynamic Measurement and Information System by Szauter, F.; Székely, J. Á.; Horváth, E. (2011) - This means vehicle at any given moment can be determined by the GPS coordinates, motor vehicle data and acceleration values calculated from dynamical parameters. The first aim of the developing vehicle-dynamic measurement and data collection system is to produce two devices, one of these is capable to examine an internal combustion engine powered vehicles and the other is for examine alternative vehicles. Keywords: acceleration; data; function; gps; measurement; module; system; vehicle
- The role of methanol inmicrobial fuel cells by Vajda, B.; Bélafi-Bakó, K.; Nemestóthy, N. (2011) - Keywords: Microbial fuel cell, Direct methanol fuel cell, Microorganisms Introduction Microbial fuel cells are electrochemical systems which convert chemical energy directly into electrical energy by microorganisms. In direct methanol fuel cells (DMFC) methanol is supplied as an energy source and a polymer membrane is used to separate the two chambers and as an electrolyte. Keywords: anode; cell; effect; fuel; methanol; putrefaciens; shewanella; system; voltage
- The Application of Unknown Input Estimators to Damp Load Oscillations of Overhead Cranes by Patartics, Bálint; Kiss, Bálint (2014) - This paper focuses on the development of state estimation methods for mechanical systems with uncertain frictional pa- rameters. [8] LANTOS B.: Theory and design of control systems I., Akadémia Kiadó, 2001 (in Hungarian) Keywords: estimation; friction; input; state; system; time; ukf
- A Network Model for Simulating the Dynamic Behaviour of an Energy Distribution Network by Bálint, Levente; Dulai, Tibor; Stark-Werner, Ágnes; Apostol, Gergely; Tompos, Ádám (2014) - The biggest problem of power distribution networks in reality is to satisfy all consumers at all the time, even if the load is very low, without making large changes to the output of the power sources everyday. Power sources have an environmental multiplier. Keywords: consumers; energy; network; power; simulation; sources; system
- On the Parametric Uncertainty of Weakly Reversible Realizations of Kinetic Systems by Lipták, György; Szederkényi, Gábor; M. Hangos, Katalin (2014) - The existence of weakly reversible realizations within a given convex domain is investigated. It is shown that the domain of weakly reversible realizations is convex in the parameter space. Keywords: kinetic; system
- Downloadable Full Issue by , (2014) - x : ↵ p �x�1 y : � p �y�1 ✓ : �✓�1 ↵ : �↵�1 � : ↵��1 � : � p ���1✏�1, y��1✏�1, ���1✏�1, x���1✏�1, y��1��1/2✏�1, ↵��1✏�1, y↵��1✏�1, x��1��1/2✏�1 � : ↵��1/2, x��1, x↵��1/2, x2��1, ���1/2, y��1, y���1/2, y2��1 ✏ : ↵✏�1, x↵✏�1, x✏�1��1/2, x2✏�1��1/2, �✏�1, y�✏�1, y✏�1��1/2, y2✏�1��1/2, (25) The QP system Eq.(21-24) can obtain the GLV form in- variants with the help of monomials. ˙✓ = ✓ ✓ Kh� ✓ �Kh ◆ ↵̇ = ↵ ✓ �� ↵ ◆ ˙� = � ✓ ↵ � ◆ (21) �̇ = �· ⇣ � 2Kv� p � �✏ + Kvy �✏ �Kvxg� �✏ + Keywords: = �; algorithm; analysis; cell; control; controller; data; design; device; energy; error; estimation; feedback; figure; following; form; graph; hungary; hydrogen; linear; matrix; mobile; model; network; non; observer; order; output; p �; pannonia; parameters; point; power; results; s �; set; signals; simulation; state; system; time; university; veszprém; y �; ↵ �; ✏ �; � d; � qs; � r; � t; � ✏; � �
- Downloadable Full 2013 Issue by , (2021) - Input-output event sequences Operational procedures in process systems are detailed list of instructions for the plant operator personnel to 60 perform certain operations on the plant. Component based structural decomposition The above mentioned fault diagnosis based on the P- HAZID analysis is only developed for process systems 61 Table 1: A simple example of a P-HAZID table. Keywords: activity; algae; algorithm; aluminium; analysis; application; average; bare; capacitor; carbon; case; cell; charge; chemical; coatings; component; concentration; conditions; constant; constraints; control; copper; corrosion; current; data; deposition; development; electrode; energy; engineering; ensemble; event; example; extraction; fault; figure; films; flatness; flow; following; function; gas; graphene; heat; hungarian; hungary; industrial; industry; information; injection; input; journal; layer; level; line; linear; manufacturing; materials; matrix; measurement; metal; method; microalgae; model; new; number; occurrence; operation; order; output; oxidation; pannonia; parameters; phase; phys; place; point; potential; power; pressure; probability; problem; process; process control; process data; process system; processes; production; properties; quality; range; rate; reconciliation; research; resource; results; samples; second; set; simulation; size; software; solution; state; structure; study; surface; system; table; tank; techniques; technology; temperature; test; time; type; university; use; values; variables; vehicle; velocity; veszprém; voltage; work; � �
- Vapor Pressure, Density, Viscosity and Refractive Index of Dimethyl Sulfoxide + 1, 4-Dimethylbenzene System by Ciocirlan, O.; Iulian, O. (2003) - Soc., 1964, 86, 127-130 4. RENON H. and PRAUSNITZ J. M.: AIChE J, 1968, 1, 135-144 5. REID R. C., PRAUSNITZ J. M. and POOLING E. B.: in Properties of Gases and Liquids, 4-rd, McGraw Hill Book Co., New York, pp. Keywords: chem; data; dimethyl; sulfoxide; system; unifac; values; viscosity
- Solid-Phase Tryptophan Synthase Biocatalysts and Their Application in Integrated Bioconversion System by Sisak, Cs.; Kovács, Á.; Szajáni, B.; Boross, L.; Orosz, L. (2003) - An integrated system constructed as a combination of the alternately working bioconversion and product adsorption steps has been proved to be applicable for tryptophan production and showed about 30 % higher productivity than the simple biotransformation system. Cell adsorption onto Celite-560 beads has resulted in sufficient productivity and recycling properties. Keywords: adsorption; biocatalyst; cm3; phase; product; system; tryptophan
- Organisation of the Analytical, Stoichiometric, and Thermodynamic Information for Water Chemistry Calculations by Földényi, Rita; Marton, Aurél (2015) - For the calculation of the unknown concentration of S species, we need the S stoichiometrically independent equation. 33–38 (2015) hjic.mk.uni-pannon.hu DOI: 10.1515/hjic-2015-0006 ORGANISATION OF THE ANALYTICAL, STOICHIOMETRIC, AND THERMODYNAMIC INFORMATION FOR WATER CHEMISTRY CALCULATIONS RITA FÖLDÉNYI* AND AURÉL MARTON Department of Environmental Science, University of Pannonia, Egyetem u. 10., Veszprém, 8200, HUNGARY A common feature of the chemical processes of the hydrosphere and water treatment plants is that essentially the same types of chemical equilibrium reactions occur in both fields. Keywords: components; equations; equilibrium; matrix; species; system
- Route Planning Based on Urban Mobility Management by Mátrai, Tamás; Tóth, János; Horváth, Márton Tamás (2016) - Information systems often Figure 2. A Pilot System in Budapest The aim of the pilot system presented in this paper is to demonstrate how a Mobility Management Centre equipped with the necessary information and information systems can provide tailor-made multimodal route advice to individual users by not only taking into account the average state of the transport network, but incorporating the current demand, too. Keywords: data; demand; information; management; mobility; network; period; route; system; time; traffic; transport
- Computational Stability Analysis of Lotka-Volterra Systems by Polcz, Péter; Szederkényi, Gábor (2016) - Therefore, extensive literature exists on the computational construction of Lyapunov functions Recently, an optimization-based method for DOA estimation was published [4], where the authors use Finsler’s lemma and affine parameter-dependent LMIs to compute rational Lyapunov functions for a wide class of locally asymptotically stable nonlinear systems. Keywords: function; lyapunov; polytope 𝒳; system
- Diagnosis of Technological Systems Based on the Structural Decomposition of their Coloured Petri Net Model by Pózna, Anna I.; Gerzson, Miklós; Leitold, Adrien; Hangos, Katalin M. (2016) - Conclusion A novel method for online fault diagnosis in a technological system is described in this paper. Petri nets and their different extensions (such as coloured, timed or hierarchical nets) are powerful tools for modelling discrete event systems Keywords: diagnosis; fault; graph; occurrence; system; tank; trace
- Downloadable Full Issue by , (2016) - The nodes of the graph refer to system states and the arcs connecting them refer to state transitions, e.g. events. Keywords: energy transmission, electrical networks simulation, distributed energy systems 1. Keywords: 44(2; algorithm; application; area; case; cement; chemistry; control; current; data; database; diagnosis; doi; energy; fault; figure; function; graph; hjic-2016; horizon; hungarian; hungary; industry; information; input; journal; level; lyapunov; management; matrix; method; mobile; model; module; network; new; number; point; power; process; results; service; set; simulation; size; solution; state; surface; synchronization; system; table; tank; time; traffic; transport; university; values; variables; vector; voltage
- Investigations of the TlInP2Se6–In4(P2Se6)3 System and its Optical Properties by Tovt, Valeria; Barchiy, Igor; Piasecki, Michal; Kityk, Iwan; Fedorchuk, Anatolii (2017) - 2. Experimental Ternary Tl4P2Se6 and In4(P2Se6)3 compounds were pre- pared by melting stoichiometric quantities of binary Tl2Se with elementary indium, phosphorous and seleni- um under a vacuum of 0.13 Pa in quartz ampoules using a single temperature method. Crystal data of TlInP2Se6 and In4(P2Se6)3 compounds. Keywords: band; compounds; in4(p2se6)3; structure; system; tlinp2se6
- Model reference adaptive control for telemanipulation by Fink, Nándor (2019) - Keywords: telemanipulation, friction compensation, sliding mode control 1. Figure 16: Bilateral control model. 0 0.5 1 1.5 2 2.5 3 Time Keywords: compensation; control; friction; model; motor; system
- Aggregation of Heterogeneous Flexibility Resources Providing Services for System Operators and the Market Participants by Balázs, István; Fodor, Attila; Magyar, Attila (2019) - This paper suggests an aggregator framework that provides services for both operators of transmission and distribution systems while optimizes its portfolio to perform on wholesale energy trading markets too. According to the proposed architecture, it has an extended responsibility, enabling the Flexibility Center to control a diverse portfo- lio of distributed resources and optimize their capacities in order to both participate in wholesale energy markets and fulfil external requests for flexibility activation. Keywords: aggregator; balancing; distribution; energy; flexibility; generation; optimization; resources; services; system
- Comparison of the approximation methods for time-delay systems: application to multi-agent systems by Fehér, Áron; Márton, Lőrinc (2019) - Math., 1996 5(1), 329–359, DOI: 10.1007/BF02124750 [16] Vyhlídal, T.; Lafay, J.F.; Sipahi, R.: Delay sys- tems: From theory to numerics and applications, Advances in Delays and Dynamics (Springer In- ternational Publishing), 2013, DOI: 10.1007/978-3-319- 01695-5 [17] Yi, S.; Duan, S.; Nelson, P.W.; Ulsoy, A.G.: The Lambert W Function Approach to Time Delay Systems and the LambertW_DDE Toolbox, IFAC Proceedings Volumes, 2012 45(14), 114–119, DOI: 10.3182/20120622-3-US-4021.00008 [18] Vyhlídal, T.; Zítek, P.: Quasipolynomial mapping based rootfinder for analysis of Time delay systems, in Proc. of IFAC Workshop on Time-Delay Sys- tems, TDS 2003, DOI: 71–77 (2019) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2019-11 COMPARISON OF THE APPROXIMATION METHODS FOR TIME-DELAY SYSTEMS: APPLICATION TO MULTI-AGENT SYSTEMS ÁRON FEHÉR *1,2 AND LŐRINC MÁRTON1 1Department of Electrical Engineering, Sapientia Hungarian University of Transylvania, C.1., Târgu Mureş, 547367, ROMANIA 2Department of Mathematics, University of Pannonia, Egyetem u. 10, Veszprém, 8200, HUNGARY This paper presents a review of dominant pole and model-approximation algorithms for delayed systems that can be applied to multi-agent systems. Keywords: agent; algorithm; approximation; delay; mas; matrix; system
- Rule-base formulation for clips-based work ergonomic assessment by Szakonyi, Benedek; Lőrincz, Tamás; Lipovits, Ágnes; Vassányi, István (2019) - Keywords: expert system, CLIPS, work ergonomics 1. [10] Berlin, C.; Adams, C.: Production ergonomics: De- signing work systems to support optimal human performance, (Ubiquity Press, London, England) 2017 pp.139-160 DOI: 10.5334/bbe [11] Szakonyi, B.; Lőrincz, T.; Lipovits, Á.; Vassányi, I.: An expert system framework for lifestyle coun- selling. Keywords: assessment; clips; doi; ergonomics; rule; system; time; type; user; work
- Downloadable Full Issue by , (2019) - Distributed genera- tion (DG), demand response (DR) and storage facilities will become important components of power systems in the future. Computer methods in power system analysis (McGraw-Hill), intern- taional student edn., 1968 Keywords: 47(1; algorithm; angle; case; chemistry; color; compensation; control; current; data; denotes; distribution; doi; energy; equations; faces; fig; figure; flexibility; following; fuel; function; grid; hungarian; ieee; images; industry; irradiance; journal; load; matrix; method; model; motor; network; new; number; optimization; paper; parameters; perception; phase; position; power; process; quantum; real; resources; results; satellite; set; simulation; solar; solution; sun; surface; system; tank; temperature; test; time; value; vector; voltage
- High-power modular inverter development for electric motor testing purposes by Szeli, Zoltán; Szakállas, Gábor (2020) - 3.2 Isolated power supply for the gate drivers The power stage includes 6 separate Flyback DC/DC converters that produce an isolated +15 V / −8 V asym- metrical power supply for IGBT gate drivers as seen in Fig. The first version is capable of 600 A at a nom- inal system voltage of 400 V. As the motor controller is equipped with standard interfaces, it is able to adapt power stages to different power levels. Keywords: circuit; gate; igbt; power; system; voltage
- Challenges of Localization Algorithms for Autonomous Driving by Medve, Hunor; Fodor, Dénes (2020) - The main groups of information sources are the fol- lowing: https://doi.org/10.33927/hjic-2020-07 mailto:medve.hunor@mk.uni-pannon.hu 44 MEDVE ÉS FODOR Figure 1: The concept of information fusion • Global Navigation Satellite Systems (GNSS) • Traditional vehicle sensors: – Odometer – Wheel speed sensor – Steering angle sensor • Inertial Measurement Unit (IMU): – Accelerometer – Gyroscope • Optical, sound- and radio-based sensors: – Radar – Ultrasonic sensors – Vision sensors – LiDAR (Light Detection and Ranging) • Vehicle models with various levels of complexity • Databases; offline or cloud-based: – Maps – Traffic situation • Dedicated short-range communication: – Vehicle-to-vehicle (V2V) – Vehicle-to-infrastructure (V2I). A wide range of traditional vehicle sensors have already been installed in most vehicles, moreover, analogue mea- surements are already being processed digitally. Keywords: estimation; filter; information; localization; sensors; state; system; time; vehicle
- Modeling of Autonomous EV Vector-Controlled Power Conversion System for Battery Management System Design by Kohlrusz, Gábor; Fodor, Dénes (2020) - Keywords: electric power conversion system, autonomous vehicle, battery management, intercon- nected simulation 1. Capacitance Cdl 0.9 F Hungarian Journal of Industry and Chemistry MODELING OF AUTONOMOUS EV POWER SYSTEM FOR BMS DESIGN 53 Figure 4: Three-phase Full-bridge Inverter the resistive drop, the voltage across the inductor and the back electromotive force (back EMF). Keywords: battery; control; controller; conversion system; current; model; power; power conversion; simulation; system; time
- Vibration Generator Device Based on Industrial Vibrators by Decsi, Péter; Szalai, István (2020) - Model., 2017, 47, 400–424, DOI: 10.1016/j.apm.2017.02.035 [6] Yao, G.Z.; Yap, F.F.; Chen, G.; Li, W.H.; Yeo, S.H.: MR damper and its application for semi- active control of vehicle suspension system, Mecha- tronics, 2002, 12(7), 963–973, DOI: 10.1016/S0957- 4158(01)00032-0 Our goal was to develop a low-cost piece of equipment for testing shock absorbers that is ca- pable of generating high frequencies (within an accept- able range for vehicles) and vibrations of low amplitude. Keywords: device; force; frequency; model; system; vibration
- Design and Construction of a Vibration Data Acquisition System for Road Vehicles by Nagy, Roland; Szalai, István (2020) - Keywords: road vehicle, vibration, data acquisition, microcontroller, accelerometer 1. Due to the important role of vibrations that can occur in road vehicles, it is important to know the condition and characteristics of a road network. Keywords: data; diagram; input; microcontroller; road; signal; system; voltage
- Optimizing the planning and manufacturing processes of electromagnetic energy harvesting equipment by Móricz, László; Szalai, István (2020) - Regarding energy harvesting systems for low fre- quency applications, the possibilities of frequency up- conversion are introduced and achieved in different ways. Keywords: energy harvesting, induced voltage, vibration, linear generator, energy 1. Keywords: coil; energy; power; resistance; system; voltage
- Localization accuracy improvement of autonomous vehicles using sensor fusion and extended Kalman filter by Szalay, István; Enisz, Krisztián; Medve, Hunor; Fodor, Dénes (2020) - The aim of the localization algorithm is to estimate the current position (x and y coordinates) and heading (yaw angle ψ) of the vehicle by fusing GPS measurements with dead reckoning based on vehicle sensor signals. = y1 = h ( x1, u1,m1 ) 1TS x1 u1 noise f ( x1, u1, p1 ) = y2 = h ( x2, u2,m2 ) 2TS x2 u2 noise Figure 1: Dead reckoning steps and propagation of the system state formulate the system model in a way that produces the true-position and heading state variables, the input vari- ables of vehicle sensor signals and the outputs of GPS signals. Keywords: filter; gps; kalman; localization; model; position; reckoning; system; vehicle
- Vol 48, No 1 (2020) Downloadable Full Issue by ., . (2020) - The converted road-description file can be used in different vehicle test systems as a basis for the func- tional testing of vehicle dynamics and driver assistance systems. István Szalai Professional Leader ”Research of autonomous vehicle systems related to the autonomous test track in Za- laegerszeg“ (EFOP-3.6.2-16-2017-00002) Keywords: 48(1; algorithm; analysis; angle; automotive; battery; car; case; cell; chain; chemistry; circuit; components; constant; control; controller; conversion; current; data; denotes; design; different; diffusion; dipole; distance; doi; driving; dynamics; efficiency; electric; energy; environment; error; estimation; field; fig; figure; filter; financial; fluid; following; frequency; function; gps; hungarian; images; impedance; industry; information; input; journal; kalman; layer; length; localization; magnetic; measurement; method; model; modeling; networks; new; nonlinear; number; order; paper; parameters; particles; phase; points; position; power; process; reference; research; resistance; results; road; sensors; set; shows; signal; simulation; speed; state; structure; surface; susceptibility; system; system model; table; test; time; track; use; values; vehicle; velocity; voltage; warburg; xbrl
Concentration
- SURFACE PROPERTIES AND TISSUE COMPATIBILITY OF NH3-PLASMA MODIFIED POLYETHYLENTEREPHTALAT MEMBRANES by Hamerli, P.; Weigel, T.; Groth, T.; Paul, D.; Marton, G. (2002) - The improved cell adhesivity of ammonia plasma modified membranes can be explained due to their hydrophilic character and the presence of nitrogen-containing functional groups [24]. Cell proliferation on plasma treated surfaces was almost 125 % of the original membrane after 6 day of cultivation. Keywords: amine; cell; concentration; membranes; pet; pet3; plasma; samples; surface; treatment
- DIRECT CALCULATION OF SULFUR DIOXIDE ABSORPTION BY WATER DROPS by Saboni, A.; Alexandrova, S.; Assenov, A. (2002) - Fig.4 shows the time evolution of the specified gaussian distribution of sulfur dioxide concentration as a population of drops faits the plume pollution with an initial peak profile concentration of 500 ppb (v). Mass transfer between gas phase and water drops depends on the physical and chemical properties of the diffusing gas, the drop size and the hydrodynamics around and inside the moving drops. Keywords: concentration; dioxide; drop; gas; model; sulfur
- MATHEMATICAL MODEL OF VARIABLE VOLUME DIAFILTRATION by Tekić, M. N.; Zavargó, Z.; Krstić, D.; Djurić, M. (2002) - Variable volume diafiltration is a continuous process in which water is continuously added at a rate Jess than the permeate flow rate so that the concentration of macrosolute continuously increases, and the final concentrations of macrosolute and microsolute can be reached simultaneously. 0.=0.7 ~---- Fig.2 Processing time vs. macrosolute relative concentration 120 +-~.-~--.-~-r--,--~-~-~~ 900 800 700 600 :s 500 .s - 400 300 200 100 0.0 ~ Q2 Q3 Q4 0~ Q6 OJ Q8 0.9 Fig.3 Processing time vs. retentate dilution Fig.3 shows how processing time depends on the ratio of the dilution flow rate to the permeate flow rate, a, at different retention. Keywords: concentration; diafiltration; time; volume
- Simulated Moving Bed (SMB) Separation of Pharmaceutical Enantiomers and Crystallization by Gál, G.; Hanák, L.; Argyelán, J.; Strbka, A.; Herseczki, Zs.; Szánya, T.; Aranyi, A.; Temesvári, K.; Horváth, Z. (2006) - 27, HUNGARY A promising solution for the separation of pharmaceutical enantiomers is the method of SMB liquid chromatography (SMB-LC). Where Bf = volumetric velocity (cm3/min), c = concentration in liquid phase (mg/cm3), z = axial distance (cm), t = time (min), ε = bed voidage (cm3 liquid/cm3 column), Af = column cross section (cm2), q = concentration in solid phase (mg/cm3). Keywords: cm3; column; concentration; crystallization; dm3; eluent; hexane; liquid; min; raffinate; smb
- INVESTIGATION OF THE INDUSTRIALLY APPLICABLE SYNTHESIS OF IMINODIACETIC ACID by Gulyás, L.; Deák, G.; Kéki, S.; Horváth, R.; Zsuga, M. (2001) - The most economical procedure for the industrial preparation of iminodiacetic acid involves aminolysis of monochloroacetic acid, where the starting materials are monochloroacetic acid, ammonia and Ca(OH)2. Our important recognition is that glycine, produced together with the desired iminodiacetic acid, can be converted with monochloroacetic acid to iminodiacetic acid after removal of the excess of ammonia from the reaction mixture. Keywords: acid; concentration; glycine; monochloroacetic; rate; reaction; time
- APPROXIMATE MODELS APPLICATION FOR MODELLING OF FIXED BED REACTORS by Szukiewicz, M.; Petrus, R. (2001) - Goto and Hirose [2], have presented a number of approximate models, but their accuracy for diffusion and reaction processes are unsatisfactory for a wide range of Thiele modulus and time. Approximate model This model is based on the concept of approximate model for the pellet. Keywords: catalyst; concentration; mass; model; pellet
- DESIGN OF A PRESSURE SWING ADSORPTION MODULE BASED ON CARBON NANOTUBES AS ADSORBENT – A MOLECULAR MODELING APPROACH by Heyden, A.; Düren, T.; Kolkowski, M.; Keil, F. J. (2001) - SYMBOLS A rotational Matrix b trial orientation C total gas concentration Ct concentration of component k Dr,t transport diffusion coefficient of molecule k Ds,k self-diffusion coefficient of molecule k one needs to know equilibrium adsorption data q;, effective pore diffusion coefficients D~.~: and an a..xial dispersion coefficient Dax. Keywords: adsorption; bed; concentration; configuration; equilibrium; ethane; gas; potential; pressure; step; trial
- Photocatalytic Degradation of Rhodamine B in Heterogeneous and Homogeneous Systems by Khan, Asfandyar; Valicsek, Zsolt; Horváth, Ottó (2021) - [26]) noticeably accelerated the rate of RhB degradation. 3.4 Generalized RhB degradation mecha- nism A very simple schematic mechanism is proposed for the purpose of RhB degradation since the reactive species produced during irradiation, namely •OH, H+ and •O− 2 , oxidize RhB molecules to intermediates of lower molec- ular weights. Keywords: concentration; degradation; doi; ferrite; h2o2; mol; nps; rate; rhb
- Unraveling the Novel Bacterial Assisted Biodegradation Pathway of Morpholine by Kumar, Rupak; Kapur, Suman; Rao Vulichi, Srinivasa (2022) - In the presence of concentration of morpholine, out of two branches of morpholine degradation one branch is induced, while the other branch is inhibited. Recently, a new approach was applied in which the culture filtrate was analyzed by 1H-NMR spec- troscopy and ion spectroscopy to identify the metabolic intermediates of morpholine degradation by M. aurum MO1 Keywords: acid; ammonia; analysis; concentration; culture; degradation; doi; filtrate; isolate; mea; morpholine; mycobacterium; pathway; presence
- Enzyme Reaction Engineering as a Tool to Investigate the Potential Application of Enzyme Reaction Systems by Milčić, Nevena; Ćevid, Ivana; Çakar, Mehmet Mervan; Sudar, Martina ; Blažević, Zvjezdana Findrik (2022) - This is the precise purpose of enzyme reaction engineering, a scientific discipline that focuses on investigating enzyme reactions with the goal of facilitating their implementation on an industrial scale. Even though reaction schemes of enzyme reactions often seem simple, in practice, the interdependence of different variables is unknown, very complex and may prevent further applications. Keywords: activity; concentration; doi; enzyme; enzyme reaction; fig; kinetic; product; reaction; reactor; stability; substrate
- Optimization of Bacillus Licheniformis DSM13 for Biosurfactant Production Using Response Surface Methodology by Sakiyo, Jesse John ; Németh, Áron (2022) - 3, Budapest, 1111, HUNGARY Biosurfactants are surface-active compounds that can reduce surface tension in both aqueous solutions and hydrocarbon mixtures, which in recent times have become more valuable due to their lower toxicity and are generally referred to as green or organic surfactants. This study investigated the kinetics of cell growth, the production of biosurfactants as well as the effect of and interactions between the (A) pH within the range of 4.1 to 9.8, (B) glucose concentration between 3.0 and 36.9 g/l, (C) surface tension and (D) emulsification index to maximize biosurfactant production. Keywords: bacillus; biosurfactant; concentration; doi; glucose; surface; tension
- Production of a Highly Concentrated Gold Solution from Aqua Regia Gold Leachate Using Sugarcane Bagasse Nanoparticles by Teniola, Oluwasanmi Samuel; Adeleke, Abraham A.; Ibitoye, Simeon Ademola; Shittu, Moshood Dehinde (2023) - (a) (b) (c) Figure 5: (a) Langmuir, (b) Freundlich and (c) Temkin isotherms of gold adsorption Co - Ce qx = (Co - Ce)*V/m logCe lnCe logqx Ce/qx 10 5.74 4.26 4.26 0.7589 1.7475 0.6294 1.3474 20 14.45 5.55 5.55 1.1599 2.6707 0.7443 2.6036 30 23.64 6.36 6.36 1.3736 3.1629 0.8035 3.7170 40 33.02 6.98 6.98 1.5188 3.4971 0.8439 4.7306 50 42.96 7.04 7.04 1.6331 3.7603 0.8476 6.1023 Table 4: Parameters evaluated by using various isotherms for gold ion adsorption onto sugarcane bagasse nanocellulose Isotherm type Parameters 40 ºC Langmuir qm 7.9936 KL 0.1779 R2 0.9979 RL 0.1578 Keywords: adsorbent; adsorption; aqua; bagasse; concentration; gold; ore; sample; solution; sugarcane
- Case Study of Continuous Itaconic Acid Fermentation by Aspergillus Terreus in a Bench-Scale Bioreactor by Hülber-Beyer, Éva; Nemestóthy, Nándor; Bélafi-Bakó, Katalin (2024) - A few studies, the last of which was published in 2000, have been reported on continuous IA fermentations with A. terreus as the producing organism [9]. This membrane operation can be integrated into a continuous fermentation process in order to carry out the process using a high glucose concentration in the effluent, opening up new possibilities for the implementation of continuous itaconic acid fermentation. Keywords: acid; concentration; doi; fermentation; glucose; g·l-1; itaconic; oxygen; rate; terreus
- A Review of the Determination of Diclofenac Sodium With Electrochemically Modified Sensors in Various Biological, Pharmaceutical and Water Sources by Hidalgo, Juan; Galambos, Ildikó; Turdean, Graziella; Hidalgo, Luis (2024) - Although most techniques used to analyze it are expensive and require highly trained professionally to operate such equipment, it is possible to detect DCF with electrochemical sensors. Electrochemical sensors to determine the diclofenac concentration Electrochemical sensors are by far the most commonly used type of sensor because of their advantages, which include limits of detection as low as picomoles, rapidity and the low-cost equipment used for sensing. Keywords: carbon; concentration; dcf; detection; determination; diclofenac; doi; electrode; graphene; lod; modifier; mwcnts; sensors; sodium; surface
- Ultrafiltration Membranes for Microdialysis by Pientka, Zbynek; Doubkova, Zuzana (2024) - The composition of the casting solution was optimized to achieve the required transport properties before membranes in the form of hollow fibers were prepared and characterized. Keywords: membrane, ultrafiltration, hollow fiber, microdialysis 1. Keywords: concentration; membranes; psu; pvp; solution
- Degradation of Pharmaceuticals from Simulated and Real Hospital Wastewater Using the Conventional Fenton Process: Optimization Conditions and Application by Appia, Foffié Thiery Auguste; Ouattara, Lassiné (2025) - 10.33927/hjic-2021-02 [18] Ribeiro, J.P.; Nunes, M.I.: Recent trends and developments in Fenton processes for industrial wastewater treatment – A critical review, Environ. Additionally, AMX degradation rates of 96.0 and 71.9% were obtained at the end of the reaction, whereas COD removal rates of 37.05 and 6.25% were obtained for high ([H2O2] = 60 mM and Keywords: amx; cod; concentration; degradation; doi; fenton; fenton process; h2o2; ions; process; rate; reaction; wastewater
- The Effect of a Ziegler-Natta Catalyst and the Polymerization Parameters on the Basic Properties of Polyethylene by Suba, P.; Árva, P.; Németh, S. (2007) - Catalyst amount (g) 0,1 0,1 0,1 0,05 0,025 C2/Ti ratio in liquid phase (mol/mmol) On the next figures we present the correlation between hydrogen amount and catalyst productivity, and the kinetic flow of the reaction (ethylene feed to maintain standard pressure in the reactor). Keywords: catalyst; concentration; ethylene; hydrogen; mol; natta; productivity; time
- Modelling of Multi-Step Microfiltration Process for Solvent Exchange by Kovács, Z.; Discacciati, M. (2008) - Both particle and solvent feed concentrations have significant contributions to the observed permeate flux. The MF separation is carried out in a multi-step batch operation including pre- concentration, dilution mode, and post-concentration process steps. Keywords: concentration; feed; flux; permeate; process; solvent; step
- Examination of the Use of Support Materials of Natural Origin in Wastewater Treatment by Fazekas, B.; Pitás, V.; Thury, P.; Kárpáti, Á. (2009) - As it can be seen on the figure, the ammonium removal capacity of the biofilter made of zeolite grains was about twice as the control reactors. It might be due to the ammonium fixation of the zeolite or an advantageous surrounding for activity of the nitrifiers on the surface of zeolite grains. Keywords: alginite; ammonium; concentration; nitrogen; reactor; removal; sludge; zeolite
- Examination of the Use of Support Materials of Natural Origin in Wastewater Treatment by Thury, P.; Fazekas, B.; Pásztor, I.; Pitás, V.; Balaskó, L.; Kárpáti, Á. (2009) - Keywords: nitrogen removal, nitrit route, two sludge cycle, animal waste rendering industry Introduction Nowadays wastewater treatment is the essential part of the environmental infrastructure. The realization of the nitrogen removal in the past The recognition of the special ways of nitrogen elimination in the wastewater treatment and the experimental results in the same field have resulted in the development of new wastewater treatment strategies. Keywords: ammonium; concentration; nitrogen; process; removal; sludge; stage; treatment; wastewater
- Examination of Crystallization Coupled to the SMB-LC Process by Gál, G.; Hanák, L.; Szánya, T.; Argyelán, J.; Strbka, A.; Marcinkóová, T.; Aranyi, A.; Temesvári, K. (2009) - Later on S enantiomer crystal seed is added to the liquid while cooling it. Solubility model calculation results S R S R S Keywords: concentration; crystallization; liquid; racemic; solubility
- Mathematical Modeling of Diafiltration by Kovács, Z.; Fikar, M.; Czermak, P. (2009) - The presented mathematical framework gives a rich representation of diafiltration processes due to the employment of concentration-dependent solute rejections. Further research effort is directed at the dynamic optimization of diafiltration processes. Keywords: concentration; diafiltration; dilution; factor; mode; optimization; permeate; process; volume
- Investigation of Isomerization of Sulphur Containing Hexane Fractions by Szoboszlai, Zs.; Hancsók, J. (2010) - The scientific articles and papers did not concerned with the long term effect of sulphur species on isomerization activity, the effects with higher sulphur concentration than the real industrial feedstock was investigated and after the deactivation they do not give any further information that the feedstock quality (distillation properties, hydrocarbon composition, heteroatom content) how influenced long term activity of the catalyst, additionally the economy and safety operation of the technology. SZOBOSZLAI , J. HANCSÓK Department of MOL Hydrocarbon and Coal Processing, University of Pannonia 8200, Veszprém Egyetem u. 10, HUNGARY, E-mail: szzsolt@almos.uni-pannon.hu The main activations of gasoline R&D activities simultaneously the stricter environmental requirements and quality specifications based on increased activity catalysts which saving more energy and feedstock. Keywords: activity; case; catalysts; concentration; content; isomerization; sulphur
- Simulation of a Secondary Settler Based on Sedimentation Curves by Somogyi, V.; Domokos, E.; Rédey, Á. (2010) - False settler values deteriorate the results of the whole model of the wastewater treatment plant. Table 1: Sets of measurement data used for the experiment Sludge concentration Aerobic tank Top of the settler Bottom of the settler Flow Excess sludge removal g/m3 g/m3 g/m3 m3/day m3/day 1. set 4316 8 9000 7030 200 2. set 5039 12 7900 6954 250 3. set 3892 8 6600 6993 250 Preparation for modeling Samples from the last section of the aerated tank were taken for three different occasions in order to receive different suspended solids concentrations. Keywords: concentration; model; results; settler; settling; solids; velocity; wastewater
- Algae Cultivation for Energetic Purposes, Research on Algae Technolgy at the University of Pannonia by Bocsi, R.; Hanák, L.; Horváth, G.; Hodai, Z.; Rippel-Pethő, D.; Szabó-Ravasz, B.; Szokonya, L.; Takács, Gy. (2012) - Our first objectives were algae cultivation for energetic purposes in addition to carbon-dioxide capture. We have studied the technology of algae cultivation and processing at the Department of Chemical Engineering at the University of Pannonia. Keywords: algae; concentration; cultivation; extraction; nutrient; processing; suspension
- Comparative Study on Concentration of Juices from Colourful Wild Berry Fruits by Membrane Osmotic Distillation by Bélafi-Bakó, K.; Boór, A.; Nemestóthy, N. (2012) - 53–56 (2012) COMPARATIVE STUDY ON CONCENTRATION OF JUICES FROM COLOURFUL WILD BERRY FRUITS BY MEMBRANE OSMOTIC DISTILLATION K. BÉLAFI-BAKÓ , A. BOÓR, N. NEMESTÓTHY University of Pannonia, Research Institute on Bioengineering, Membrane Technology and Energetics 10 Egyetem Str., 8200 Veszprém, HUNGARY E-mail: bako@almos.uni-pannon.hu Concentration of fruit juices by membrane osmotic distillation (MOD) was studied. 119–123 4. K. BÉLAFI-BAKÓ, B. KOROKNAI: Enhanced flux in fruit juice concentration: coupled operation of osmotic evaporation and membrane distillation, Journal of Membrane Science, 269 (2006) pp. Keywords: concentration; figure; fruit; juices; membrane; process
- Biocatalytic Hydrogen Sulphide Removal from Gaseous Streams by Tóth, G.; Lövitusz, É.; Nemestóthy, N.; Bélafi-Bakó, K. (2012) - Removal of hydrogen sulphide is usually carried out by physical-chemical methods (e.g. adsorption), but nowadays some bio-processes may be considered as promising alternatives. Various strains have been applied so far for degradation of hydrogen sulphide, they belong mostly to the group of Thiobacillus, which are autotrophic microorganisms. Keywords: bacteria; carbon; concentration; figure; hydrogen; phase; sulphide; thiomonas
- Investigation of Kinetics of Hydroisomerization of C5/C6 and C6/C7 Alkanes and their Binary Mixtures by Szoboszlai, Zs.; Hancsók, J. (2011) - Based on the measured and calculated values it was concluded that in case of the non-adequate feed or in case of non-adapted isomerization catalyst – where accordingly to the demands the changes of process parameters have not indicated any opportunity – influence of some component on the isomerization efficiency become significant degree hereby the main linear chain components with low octane number reactions rate of isomerization was interfered. n-pentane concentration in binary mixture, % reaction rate of n-hexane reaction rate of n-pentane Figure 2: Changes in reaction rate of individual components in the binary mixture (T: 150 °C, LHSV: 1.5 h-1, P: 20 bar) 0 5 10 15 20 25 30 35 0 20 40 60 80 100 R ea ct io n ra te , 1 0-8 m ol /s. Keywords: benzene; binary; catalyst; concentration; isomerization; number; octane; rate; reaction
- Removal of Hydrogen Sulfide from Natural gas,a Motor Vehicle Fuel by Vágó, Á.; Rippel-Pethő, D.; Horváth, G.; Tóth, I.; Oláh, K. (2011) - Besides energy density, hydrogen sulfide content for example is a critical quality parameter of natural gas, hence it is strictly regulated. The typical contents of natural gas are given in Table 1, but they can be different for every gas field. Keywords: alkali; carbon; concentration; efficiency; flow; gas; hydrogen; nm3; removal; sulfide; volume
- Experiments for d-lactic acid production with fermentation by Németh, Á.; Kiss, Á.; Sevella, B. (2011) - Use of sweet sorghum juice for lactic acid fermentation: preliminary steps in a process optimization, Journal of chemical technology 85 (2010) 872–877 362 4. K. HETÉNYI, Á. NÉMETH, B. SEVELLA: Optimization of wheat flour based medium for lactic acid fermentation, Chemical and Biochemical Engineering Quarterly 24(2) (2010) 195–201 5. For this reason we wanted to examine the possibilities for D-lactic acid fermentation with Lactobacillus coryniformis. Keywords: acid; concentration; fermentation; glucose; inhibition; production
- Corrosion Protection with Ultrathin Graphene Coatings: a Review by Gergely, András; Kristóf, Tamás (2021) - Nevertheless, coherence, and uniformity of Gr coatings are apparently vital to achieve good corrosion protection. Pure Graphene Coatings Direct Chemical Vapour Deposition (CVD) on Metal Surfaces Early studies were inspired to synthesise full surface covering Gr films of the highest domain (single sheet) size and integrity to exert impermeability over macroscopically large surfaces. Keywords: bare; barrier; carbon; cell; chemical; coatings; composite; concentration; conditions; copper; corrosion; corrosion protection; cvd; deposition; electrode; epd; films; gr films; graphene; gro; growth; kim; layer; mater; metal; min; nano; nickel; oxidation; oxide; potential; pressure; protection; rate; resistance; samples; solution; steel; substrate; surface; times; wt.%
- Downloadable Full Issue by , (2021) - [9] YU S., LIU M., MA M., QI M., LÜ Z., GAO C.: Impacts of membrane properties on reactive dye removal from dye/salt mixtures by asymmetric cellulose acetate and composite polyamide nanofiltration membranes, J. Membrane Sci., 2010, 350(1-2), 83-91 Nevertheless, coherence, and uniformity of Gr coatings are apparently vital to achieve good corrosion protection. Keywords: algae; average; bare; bio; carbon; case; cell; charge; chem; chemical; chlorophyll; coatings; composite; concentration; conditions; copper; corrosion; cvd; density; deposition; electrode; energy; ensemble; extraction; figure; films; graphene; gro; growth; hungary; layer; materials; metal; microalgae; nickel; number; oxidation; oxide; paraffin; parameters; phase; phys; polymer; potential; pressure; properties; protection; rate; results; samples; simulation; size; solution; steel; substrate; surface; technology; temperature; times; university; veszprém; voltage; waste
- Study of the Interference Effects of Aluminium on The Atom- and Ion-Lines of Alkaline Earth Metals in Aqueous Solutions Using an ICP Spectrometer with Axially Viewed Plasma by Bánhidi, Olivér (2015) - Higher aluminium concentrations cause only a moderate reduction in the signal. 3. Results In the experiments, we studied the intensity changes of several atom- and ion-lines of the alkaline earth metals as a function of aluminium concentration, analyte concentration and that of the device used for sample- introduction. Keywords: concentration; dm-3; lines; nebuliser
- Downloadable Full Issue by , (2015) - J. Coal Geol., 2002, 50(1), 135–168 DOI: 10.1016/S0166-5162(02)00117-9 J. Coal Geol., 2002, 50, 289–412 DOI: 10.1016/S0166-5162(02)00123-4 [ Keywords: adsorption; ash; capacitance; case; cellulose; charge; chem; chemistry; coal; concentration; data; decontamination; doi; electrode; fenton; figure; gcs; henderson; hungarian; ions; layer; liquid; method; mineral; msa; photocatalysis; processes; results; samples; solution; standard; study; surface; table; theory; tio2; treatment; university; values; � d/2; � �
- Downloadable Full Issue by , (2016) - In accordance with the literature, high free fatty acid contents lead to high corrosion rates accounted for direct corrosion of high alloy steels and assisted solubilisation of corrosion products. [25] Deb, K.; Agrawal, S.; Pratap, A.; Meyarivan, T.: A fast elitist non-dominated sorting genetic algorithm for multi-objective optimization: NSGA-II, in Parallel problem solving from nature PPSN (Eds.: Schoenauer VI, M.: Deb, K.; Rudolph, G.; Yao, X.; Lutton, E.; Merelo, J. J.; Schwefel, H.-P., Springer, Berlin, Germany) 2000 pp. Keywords: acid; action; algorithm; alloys; carbon; case; channels; charge; chemical; chemistry; concentration; conditions; conservation; corrosion; current; design; devices; displacement; doi; effect; eisenberg; energy; equations; experiments; field; flow; function; gas; groups; h2s; hungarian; hydrogen; industry; journal; law; mass; method; mixtures; model; new; non; number; oil; phase; potential; pressure; process; properties; property; range; rates; reactions; removal; results; scales; set; solutions; steel; sulphide; systems; table; temperature; theory; time; university; vacuum; values; vapour; york
- Improvement Possibilities of Heterogeneous Photocatalysis with the Aim of In-Field Use by Fónagy, Orsolya; Hegedűs, Péter; Szabó-Bárdos, Erzsébet; Dobrádi, Annamária; Horváth, Ottó (2017) - [19] Ishibashi, K. I.; Fujishima, A.; Watanabe, T.; Hashimoto, K.: Detection of active oxidative species in TiO2 photocatalysis using the fluorescence technique, Electrochem. Irradiation of the immobilized catalysts in the absence of the model compound led to the dissolution of the side-products of the cracking processes, and they also underwent heterogeneous photocatalytic degradation due to the presence of TiO2. Keywords: acid; catalyst; concentration; degradation; formation; hydroxyl; irradiation; photocatalysis; pva; radicals; rate; surface; tio2; toc; treatment
- Simulating Ion Transport wth the Np+Lemc Method. Applications to Ion Channels and Nanopores. by Fertig, Dávid; Mádai, Eszter; Valiskó, Mónika; Boda, Dezső (2017) - APPLICA- TIONS TO ION CHANNELS AND NANOPORES. Keywords: ion transport, Nernst-Planck, Monte Carlo simulation, nanopore, ion channel 1. Keywords: boda; ca2; channel; concentration; current; doi; gillespie; ions; method; model; na+; phys; potential
- Capillary Isotachophoresis Determination of Trace Oxidized Glutathione in Blood by Bodor, Róbert; Nečasová, Andrea; Pechová, Alena; Masár, Marián (2018) - Blood samples that had been di- luted by a factor of ten were directly analyzed after their filtration through a syringe filter with a pore size of 1 µm. The simple and rapid preparation of blood samples, that only involves the masking of thiol group of GSH and the dilution and filtration of the sam- ple, increases the accuracy of the GSSG concentration measured. Keywords: concentration; doi; electrophoresis; glutathione; samples
- Recovery of Itaconic Acid by Electrodialysis by Varga, Veronika; Bélafi-Bakó, Katalin; Vozik, Dávid; Nemestóthy, Nándor (2018) - Itaconic acid – unlike citric acid – is applied exclu- sively for non-food purposes [2]. The experiments with models of aqueous solutions con- firmed that the technique is suitable for the effective recovery of itaconic acid. Keywords: acid; concentration; doi; itaconic; membranes; sodium; solution
- Separation by Ion Exchange and Adsorption Parametric Pumping V. by Hanák, L.; Szánya, T.; Szolcsányi, P. (2004) - SYMBOLS v0 superficial velocity of liquid phase xj ion ratio of component “j” in the liquid phase xj,0 initial ion ratio of component “j” in the liquid phase yj ion ratio of component “j” in resin phase C0 total cationic concentration of liquid phase C20,j reservoir concentration of component “j” after the 20th cycle L the length of ion exchange column NT theoretical cycle number P20,j product purity of component “j” after the 20th cycle i jT ion exchange selectivity coefficient of ion “i”, related to ion “j” ∆V volume flow through in half cycle α’ dimensionless ion proportion, the ratio of cation amount flowing through during half cycle and ion exchange capacity of the column ηi cycle efficiency related to component “i” 71 REFERENCES 1. Cycle efficiency (ηi) was defined as the ratio of the theoretical and actual cycle numbers. Keywords: concentration; cycle; dm3; equ; exchange; ion
Process
- Optimization of Food Logistic Processes by Simulation Technique by Hajnal, É.; Kollár, G. (2005) - The basis of process simulation is a very detailed process mapping. Continuous time models describe a smooth flow of homogenous values; time changes in equal increments and values change based directly on changes in time. Keywords: block; change; event; fig; items; model; optimization; process; processes; simulation; time
- A NEW PROCEDURE OF PHOSPHOGYPSUM PURIFICATION IN ORDER TO DIMINISH THE CONTENT OF RADIONUCLIDES by Rajković, M. B.; Tošković, D. (2002) - Phosphogypsum and natural gypsum samples were analysed using scanning electron microscopy SEM, JSM-840A, JEOL, Japan. The obtained results of radionuclide content analysis in raw phosphogypsum are in accordance with literature data obtained by investigation of 2~a isotope contents in various types of phosphogypsum, which range from 430 to 790 Bq/kg. Keywords: acid; analysis; phosphogypsum; phosphoric; procedure; process; production; radionuclides; sulphate; uranium; wt.%
- INTERNET BASED SURVEY AS I/O SUPPORT IN PROCESS APPROACHED QMS OF FOOD/AGRO INDUSTRIES by Kápolna, B.; Szabó, R.; Viczián, G.; Kollár, G. (2002) - In one of our earlier papers [4] we discussed Internet vs. paper-based replies to questionnaires surveying the rates of food consumption in different areas of food market Comparing these types of replies we found an interesting~ but - in view of the number of answers - insignificant difference between the two groups in FFV consumption and in meat consumption. The other reason could be, that meat consumption belongs to the traditional Hungarian lifestyle. Keywords: answers; consumption; customers; ffv; hungary; internet; meat; option; process; quality
- Quasi-Continuous Elution Chromatographic Purification of a Steroid Active Compound by Temesvári, K.; Aranyi, A.; Horváth, Z.; Nagy, M.; Szánya, T.; Hanák, L. (2006) - The main steps of the elaboration of the quasi- continuous process are: (A.) Preliminary elution experiment on one of the eight 250X16 mm I.D. columns used in the SMB unit for quasi-continuous elution separation, for the determination of the solvent volumes necessary to the steps of the separation. After the elaboration of quasi-continuous elution chromatographic purification, the intensification of the process was carried out. Keywords: columns; compound; elution; experiment; process; quasi; separation; smb
- A Study on the Rate and Mechanism of Thermal Degradation of Starch in Production of Flocculants by Gyenis, J.; Dencs, J.; Nős, G.; Marton, G. (2006) - Tim e, min MW fractions, MDa 145 oC 32 molecular weight category (above 32 MDa) whose products still remain within this category (when e.g. a molecule of 100 MDa splits into two fragments with 60 and 40 MDa molecular weights). The degradation probability of the molecules being in a given molecular weight interval were increasing with rising treatment temperature and reduced significantly with decreasing molecular weight. Keywords: degradation; distribution; mda; model; molecules; process; reaction; starch; temperatures; time; weight
- IMPROVING ENVIRONMENTAL PERFORMANACE WITH LIFE-CYCLE ASSESSMENT by Vizi, Sz.; Herner, K.; Kneffel, D. (2000) - 55 Impact Effect Damage Valuation Fig.2 Weighting method for environmental effects [2] mPt ozone w.tmog •·•11109 pesticid enerw sefid •'carbinol .Magnesii.rmignots In Europe the Eco-lndicator method {made by the Dutch Pre Consultant) is used widely when we talk about environmental components. Keywords: assessment; chemical; cycle; life; method; pollution; process; toluene
- Process Simulation of Hole Mandrelling in Steel Aircraft Parts by Voronko, Iryna; Voronko, Vitalii; Dyachenko, Yuri; Shapar, Serhii (2023) - During hole mandrelling, the tool, that is, a mandrel, is pushed through the hole with a slightly smaller diameter compared to the tool itself. [8] by carrying out the following activities: - improving the quality of hole processing; - applying advanced processing methods that do not place the surface layer under tensile stress; - bimetallizing holes; - selecting the optimal ratio of tensions when setting the bolt in the bolt hole and the axial compressive force; - chemical-thermal treatment; - design optimization; - processing by SPD methods. Keywords: aircraft; figure; hole; mandrelling; metal; parts; process; simulation; steel; surface
- Application of Experimental Design-Based Predictive Models and Optimization in Additive Manufacturing – a Review by Drégelyi-Kiss, Ágota (2024) - Several methods are found in the literature for single or multi- response optimization of manufacturing processes, a few of which are detailed in Chapter 2.3. Four factors influence manufacturing processes, namely the curing process, drop properties, inkjet printhead parameters and type of support. Keywords: additive; design; doe; doi; experiments; factorial; factors; manufacturing; manufacturing process; material; methods; number; optimization; parameters; parts; process; properties; quality; response; rsm; surface; taguchi
- Process Engineering Research and Education at the Department of Process Engineering – Past, Present and Future by Abonyi, J. (2007) - On the one hand, pedagogical materials have been developed and courses delivered covering important advances in process systems engineering as they have emerged from the research community. Indeed, there is some evidence that the desire to help students to develop the skills needed to tackle complex engineering problems partly motivated the early research in process systems engineering. Keywords: chemical; control; department; design; development; education; engineering; process; process engineering; research; systems
- Control Structures Based on Constrained Inverses by Szeifert, F.; Chován, T.; Nagy, L. (2007) - This can be designed on the basis of model error in several ways. Model error compensation The design of the model error compensator is based on Fig. Keywords: control; error; feed; inverse; inverse model; model; model error; process
- Control of a Continuous Vacuum Crystalliser in an Industrial Environment: A Feasibility Study – Comparision PID to Model Predictive Control Solution by Moldoványi, N.; Abonyi, J. (2007) - BUT the overshoots and high order models would be too sensitive to model error and it would not work in model based controller. A major factor in the success of model based predictive control is its’ applicability to problems where analytical control laws are difficult, or even impossible to obtain. Keywords: axis; control; controller; crystalliser; model; mpc; pid; process; rate; size; time; variables
- What Happens to Process Data in Chemical Industry? From Source to Applications – an Overview by Balaskó, B.; Abonyi, J. (2007) - These technologies, due to their highly automated level, provide mountains of process data, which is applied only in daily operation and control, but it definitely can give access to the underlying structure of any system. To enhance this automation level while keep operation safe and efficient, one needs more information, i.e. knowledge about the process, which can be extracted from process data, and more tools, which can extract effectively this knowledge. Keywords: analysis; chemical; classification; control; data; engineering; feature; fig; information; kdd; knowledge; mining; process; selection; systems; techniques; time
- Application of Exploratory Data Analysis to Historical Process Data of Polyethylene Production by Abonyi, J. (2007) - Process monitoring based on multivariate statistical analysis of process data has recently been investigated by a number of researchers [3]. As one of the objectives is to infer the values of product quality from process data obtained at different operating regions, a set of transition-free data is used that covers the whole range of specifications of the quality properties and the process variables over all the possible operating regions. Keywords: analysis; box; data; distribution; plot; process; product; production; quality; quantile
- Decision Tree Based Qualitative Analysis of Operating Regimes in Industrial Production Processes by Varga, T.; Szeifert, F.; Réti, J.; Abonyi, J. (2007) - To emphasize how decision trees can be applied to extract useful information from the sequences of process trends, and how they are able to represent the 96 operating regimes, an industrial heterocatalytic reactor was analyzed. The paper is organized as follows: in Section 2 the method of qualitative analysis of process trends is briefly introduced, it is followed by the introduction of the developed algorithm for detection of operating regimes. Keywords: decision; process; qualitative; reactor; sequence; trends
- Techno-Economic Aspects of on-Site Cellulase Production by Barta, Zs.; Sassner, P.; Zacchi, G.; Réczey, K. (2008) - y = 464.032x-0.815 R2 = 0.997 0 2 4 6 8 10 12 14 16 18 50 100 150 200 Produktivitás, FPU /(l*h) cent/L E tOH Figure 3: Specific enzyme cost as a function of productivity By increasing the productivity the specific enzyme cost reduced monotonously. The breakdown of specific enzyme cost also shows that the main contributors were the capital and the utilities (Fig. 4). Keywords: capital; case; cost; enzyme; fermentation; process; production
- Improving the Mathematical Model of a Heterocatalytic Tube Reactor by Varga, T.; Rádi, G.; Chován, T. (2008) - The former version of reactor model was applied in a Operator Support System Reactor model The investigated, vertically positioned reactor contains a large number of tubes filled with catalyst as shown in Fig. Keywords: catalyst; cfd; gas; model; pellet; phase; process; reactor
- Determination of Safety Operating Regimes Based on the Analysis of Characteristic Equation of State-Space Model by Varga, T.; Horváth, G.; Abonyi, J. (2008) - Keywords: operating regime, process model, simulation fed-batch reactor, stability analysis. Therefore a tool based on process models and stability analysis can be very useful in checking the appropriate operation and helping their work. Keywords: analysis; model; operation; process; reaction; reactor; runaway; stability
- Differences between Optimum Flow Sheet Solutions Obtained by Different Economic Objective Functions by Kasaš, M.; Kravanja, Z.; Novak Pintarič, Z. (2009) - I 0 10 20 30 40 50 60 70 80 b) 0 CF I Figure 1: Cash flow functions, a) unimodal, b) concave Unimodal cash flow functions Unimodal cash flow function is common for flow sheet modeling with simple and aggregated models at early stages of process development, e.g. by stoichiometric reactor with fixed conversion per pass or simple component splitter. NOVAK PINTARIČ University of Maribor, Faculty of Chemistry and Chemical Engineering Smetanova 17, SI 2000 Maribor, Slovenia E-mail: zorka.novak@uni-mb.si This paper discusses the shapes of cash flow functions obtained by modelling chemical processes at different levels of complexity, and the influence of these shapes on optimal solutions obtained by different economic objective functions. Keywords: cash; flow; functions; investment; process; solutions
- State of Process Developments and Trends in Hard Gear Finishing by Lukács, M. (2010) - The examination of process combination The main goal is to increase productivity and benefit from the advantages of the two specific hard finishing processes, while avoiding their disacvantages; for this end, several types of process combinations are applied in the industry. The most common machine tool control system applied in generating grinding machines is the Siemens 840D, which includes its own complex generating grinding software, which can significantly ease machine tool programming. Keywords: finishing; gear; grinding; machine; pitch; process; processes; profile; tool; wheel; worm
- Risk Methods and Chance of Practices by Tóth, G. N.; Berek, L. (2010) - Keywords: Risk methods, risk management software Introduction Many forces are obliging safety design; legal requirements, quality, costs, market and international influences, competition, the desire to have knowledge and the costs of retraining engineers. I examined one of the most general software, Risk optimizer 5.5, which enables to prepare risk assessment. Keywords: analysis; assessment; management; methods; process; risk; tree
- Effects and changes of zearalenone and fumonisin contamination in corn-based bioethanol process by Prettl, Zs.; Lepossa, A.; Tóth, É.; Kelemen-Horváth, I.; Németh, Á. Sz.; Nagy, E. (2011) - In this work dry-grind ethanol production was carried out from different corn samples (uncontaminated; zearalenone; fumonisin B1+B2 contaminated) and the changes of the ratio of the solid-liquid phase as well as toxin concentrations were examined in laboratory scale. Similar conversion efficiencies could be observed at the end of the fermentation process, though the specific ethanol yield was 27% lower in the case of contaminated corn stock (Table 3). Keywords: corn; ethanol; fb1; fumonisin; fusarium; maize; mycotoxins; phase; process; toxin; zearalenone
- Education in Chemical Process Control Using the Supervisory Laboratory Application by Vasile-Mircea, C.; Dan, L.; Serban Paul, A. (2003) - The application serves as a convenient tool for manipulating the tuning parameters and for 35 revealing their effectiveness in different cases of pilot process control. Incentives for process control education For the mathematical modelling purpose the CAPE application serves as a useful provider of accurate process experimental data and a versatile process input (manipulated) variable function generator Keywords: application; computer; control; controller; data; pilot; process
- Separation of Process Wastewater with Extractive Heterogeneous-Azeotropic Distillation by Tóth, András József; Szanyi, Ágnes; Haaz, Enikő; Mizsey, Péter (2016) - [10] Franke, M.; Gorak, A.; Strube, J.: Design and optimisation of hybrid separation processes, Chem. 4. Conclusion EHAD separation technique improves in the separation of heterogeneous azeotropic mixtures. Keywords: azeotropic; distillation; ehad; liquid; mixtures; process; separation
- Modelling the Partial Demineralization Process of Cow Milk by Superpro Designer by Csighy, Attila; Koris, András; Vatai, Gyula (2017) - Keywords: partial demineralization, SuperPro Designer, modelling, economic analysis 1. Introduction Dairy products play an important role in the health of humans as milk contains a number of biologically active compounds (proteins, lipids, vitamins and minerals). [3] Suárez, E.; Lobo, A.; Álvarez, S.; Riera, F.A.; Álvarez, R.: Partial demineralization of whey and milk ultrafiltration permeate by nanofiltration at pilot-plant scale, Desalination, 2006 198(1-3), 274–281 DOI 10.1016/j.desal.2005.12.028 Keywords: demineralization; designer; milk; process; table; unit; whey
- Optimal Design and Operation of Buffer Tanks Under Stochastic Conditions by Tarcsay, Bálint Levente; Mihálykó-Orbán, Éva; Mihálykó, Csaba (2018) - Hungarian Journal of Industry and Chemistry OPTIMAL DESIGN AND OPERATION OF BUFFER TANKS UNDER STOCHASTIC CONDITIONS 95 Figure 3: The probability of a failure as a function of the initial buffer and tank capacities. puted, it can be determined whether or not the continuous withdrawal caused the shortage during the time interval bounded by the last two batch events. An analytic function Hungarian Journal of Industry and Chemistry OPTIMAL DESIGN AND OPERATION OF BUFFER TANKS UNDER STOCHASTIC CONDITIONS 99 was fitted to the simulated data, which provided a link between the initial buffer and tank capacities that corre- spond to a given level of reliability. Keywords: buffer; capacity; function; material; process; reliability; tank; time
- Residence Time Distribution-Based Analysis of an Industrial-Scale Biogas Fermenter by Tankovics, András; Takács, Dávid; Szendefy, Judit; Csukás, Béla; Varga, Mónika (2019) - The mixing flows between the 21 (approximately per- fectly mixed) compartments are as follows: - Circflowmix: cyclically changing recycle flow, su- perposed by a bidirectional mixing flow between the an- nular slices above each other; - Gasflowmix: bidirectional mixing flow, induced by the upward biogas flow between the compartments above 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0 5000 10000 15000 20000 25000 30000 35000 40000 C o n ce n tr a ti o n , m g /L Time, hour Measured tracer concentration in effluent Figure 3: Measured tracer concentration of Li+ in the ef- fluent of the industrial-scale fermenter (40 kg of lithium chloride dissolved in 150 litres of tap water was added to a sludge of sugar beet slices that entered segment #4 at a flow rate of 43 m3/h for 150 seconds). 47(2) pp. Taking into account the geometrical arrangement, the biogas flow produced and the cyclically changing recycle flow, various mixing models were generated with different compartmentalization and flow structures by applying the method of Programmable Process Structures. Keywords: anaerobic; distribution; effluent; flow; mixing; model; process; scheme; sludge; time
- Programmable Process Structure Based Analysis of Hydrogen Supply Chains by Varga, Mónika; Azzaro-Pantel, Catherine; Flores-Perez, José Manuel; Csukás, Béla (2019) - According to the recently published special section of the AIChE Journal about “Hydrogen Deployment” [1], the importance of hydrogen energy is expected to grow in the future because stakeholders have just started to discover the potential advantages of it worldwide The two corre- sponding kinds of hydrogen production processes are electrolysis and the different methods of gas separa- tion for hydrogen enrichment, e.g. membrane separation, pressure swing adsorption, etc. Keywords: elements; energy; hsc; hydrogen; meta; model; process; production; prototypes; simulation; state; structures; supply; transition
- Basic Principles of Process Modelling by Almásy, G. A.; Kollár-Hunek, K. (2005) - Our aim is to present some properties of process models necessary to be correct in the sense that they obey the postulates below, i.e., the obvious rules of classical 2 Newtonian physics. The first question is whether it is a necessary condition for process models to fulfil the condition not to contradict the rules of conservation. Keywords: density; entity; model; operation; postulate; process; processes; state; streams; subprocesses; time; transfer; variables
- INSTRUMENTATION AND CONTROL OF INDUSTRIAL WASTEWATER TREATMENT PROCESSES by Pisko, M.; Náhlík, J.; Hanta, V. (2002) - This, in combination with increasing loads, and limited availability of resources, calls for efficient methods of wastewater treatment processes. All this means that the knowledge base for conventional activated sludge operations no longer directly applies and has to be adapted along with control methods themselves. Keywords: control; flow; methods; oxygen; process; processes; rate; sludge; systems; treatment; wastewater
- Fuzzy Association Rule Mining for Data Driven Analysis of Dynamical Systems by Pach, F. P.; Szeifert, F.; Németh, S.; Árva, P.; Abonyi, J. (2005) - Keywords: process modeling, model structure selection, association rules, rule base systems, polymerization Introduction This suitability measure can be used for the purpose of model structure selection prior to the actual parameter identification. Keywords: association; data; item; linear; model; output; process; rule; selection; set; sets; structure; support
- Constrained PI(D) Algorithms (C-PID) by Szeifert, F.; Nagy, L.; Chován, T.; Abonyi, J. (2005) - The main reasons for this dominancy are the role of PID controllers in the classical control technologies, their position in the engineering curriculum, their availability in DCS’s and not at least the efficiency of their application. At the same time, regarding processes with not higher than second order dynamics, the solution a rigourous model-based one. Keywords: constrained control, PID algorithm, model-based, constrained inverse Introduction Based on different surveys, 95% of control algorithms used in industrial processes is PID or PID modification and most of these is badly tuned. Keywords: algorithm; control; controller; model; order; output; pid; process; time
Time
- APPLICATION OF FOURIER TRANSFORMATION FOR WASTE MINIMIZATION IN BATCH PLANTS. 1. ANALYSIS OF PRODUCTION RECIPES by Vaklieva-Bancheva, N. G. ; Shopova, E. G. ; Ivanov, B. B. (2002) - Environmental impact indices. The operational mode affects the level and distribution of environmental impact into the production cycle, which is very important for -environmentally efficient control of batch processes. Keywords: bod; content; curd; environmental; impact; milk; product; production; time; waste
- TOWARD GLOBAL OPTIMIZATION OF A DIFFICULT OPTIMAL CONTROL PROBLEM by Luus, R. (2001) - When the number of time stages is small, then the optimal control policy can usually be readily obtained either by iterative dynamic programming [2,3) or with the LJ optimization procedure [4}. However, there are some problems where the structure of the optimal control policy changes quite substantially when the number of time stages is increased. Keywords: control; stages; time
- Vehicle Routing Approach for Lean Shop-Floor Logistics by Gyulai, Dávid; Monostori, László (2022) - The milkrun logistics planning is a special case for vehicle routing problem (VRP), and requires effective approach to solution in order to satisfy various constraints, and minimize the cost of service. Keywords: vehicle routing problem, milkrun, local search, factory logistics Introduction The material provision of large- and medium-scale production systems requires prudent planning and control, since it influences the performance of the production and affects the order management directly and storage assignment [1]. Keywords: algorithm; logistics; milkrun; planning; problem; production; routing; search; solution; time; vehicle
- Experimental Implementation of a Resource-Constrained Multi-Project Scheduling Problem Solver by Mihály, Krisztián; Kulcsárné Forrai, Mónika; Kulcsár, Gyula (2022) - 2. Resource-constrained project schedul- ing problem Our extended model is based on the well-known resource–constrained project scheduling problem (RCPSP). Introduction Research into project scheduling has a solid and extensive background, moreover, it is still an active research area because – by not taking special cases into consideration – it belongs to the NP-hard (non-polynomial) problems Keywords: model; problem; project; resource; schedule; scheduling; task; time
- Gripper Finger Design for Special Purpose Applications by Boleraczki, Miklós; Gyurika, István Gábor; Fodor, Dénes (2022) - [1] Pham, D. T.; Yeo, S. H.: A knowledge-based sys- tem, for robot gripper selection: Criteria for choos- ing grippers and surfaces for gripping. Fi- nally, a gripper was developed that has two thumbs, one Hungarian Journal of Industry and Chemistry GRIPPER FINGER DESIGN FOR SPECIAL PURPOSE APPLICATIONS 93 on both the right and left side of the hand, with three fin- gers in between them. Keywords: design; doi; fingers; gripper; manufacturing; robot; time
- Upgrading Potential of Waste Fermentation-Based C4-C5-C6 Carboxylic Acid Mixtures using Electrochemical Oxidative Decarboxylation by Rózsenberszki, Tamás; Kucsera, Katalin; Bocska, Boglárka; Farkas, Gergely; Koók, László (2025) - Keywords: carboxylic acid, electrochemical upgrading, esters, Kolbe electrolysis, liquid alkanes 1. Among them, (non) -Kolbe electrolysis, that is, electrochemically driven oxidative decarboxylation of carboxylic acids, plays a key role as its product palette consists of alkanes (Kolbe products) as well as competing non-Kolbe products, including short- chain alkenes, alcohols, esters, ketones and aldehydes. Keywords: acid; doi; electrolysis; formation; kolbe; product; time; vfa
- Dynamic Model and Control of Heat Exchanger Networks for District Heating by Dobos, L.; Jäschke, J.; Abonyi, J.; Skogestad, S. (2009) - Keywords: district heating network, modeling, non-linear model predictive control, MPC Introduction It has become natural for people today to have a network for the distribution of the electricity. Taking model error into consideration is not a negligible fact since the performance of the model predictive control is a function of the model parameters, and model parameters can be the function of the time (eg. fouling in the heat exchangers can change the heat transfer coefficient). Keywords: case; control; district; district heating; heat; heating; heating network; imc; model; network; optimization; performance; predictive; time
- PCA Driven Similarity for Segmented Univariate Time Series by Bankó, Z.; Abonyi, J. (2009) - The increasing popularity of knowledge discovery and data mining tasks for discrete data has indicated the growing need for similarly efficient methods for time series data. Finally, it is shown that the presented method can be considered as the logical extension of the Correlation Based Dynamic Time Warping (CBDTW) to univariate time series. Keywords: data; distance; dtw; pca; pla; segmentation; segments; series; similarity; time; time series
- Relationship between Input Channel Excitation Time and Profinet IO Refresh Time by Ferenczi, I. (2010) - Keywords: Profinet IO, cycle time, real-time, refresh time, PLC, IO device, IO channel, delay time, communication Introduction Profinet IO permits direct interfacing of distributed field devices on the Ethernet. The log file of the IO controller did not register a single collision or bad frame, albeit only a minimal Profinet IO configuration (controller, IO device and IO supervisor) were part of the network. Keywords: channel; data; device; input; profinet; refresh; time
- The Attendance of Rational Energy Utilization and of the Green Energy by Farkas, A.; Faragó, P. (2011) - The non-rational energy utilization could be recognized in the consumption of the country which includes just 6–7% of renewing energy resources. Keywords: energy balance, energy consumption, time balance-examination, renewable energy, biomass Introduction At the beginning of the XXI century the reserves of the World are running out, thus now days our biggest challenge is the solution of the energy crisis. Keywords: balance; biomass; energy; energy balance; hours; hungary; research; resources; time; use; utilization
- Comparison of Hard Machining Procedures on Material Removal Rate by Molnar, V.; Kundrak, J. (2011) - [mm3/s] L=27.35 mm Figure 2: Practical values of material removal rate based on the operation time by the same bore-hole length Conclusion Focusing on industrial demands, the applicability of hard machining procedures and the determination of their fields of application have been invariably a key research topic. However, it is not easy to outline the application fields where grinding may be substituted by hard turning [1, 2]. Keywords: bore; grinding; hole; machining; min; procedure; time; turning
- Profit optimization of batch-continuous production systems under stochastic processingconditions by simulation by Orbán-Mihálykó, É.; Mihálykó, Cs.; Lakatos, B.G.; Szabó, T.; Papp, A. (2011) - Then an important question arises: how much profit can be obtained as a function of the volume of storage system, the initial amount of the material in the storage and the output rate. Such buffering action requires rational sizing of intermediate storages in the design phase Keywords: function; material; profit; storage; time; volume
- Mass Action and Conservation of Current by Eisenberg, Robert S. (2016) - In general, the conservation of current law illustrated in Eq.(5) is violated IXY ≠ IYZ, (8) for a range of concentrations, rate constants, or charges. It is important to note that the continuity of current law has important biological implications in systems more general than a series of chemical reactions. Keywords: action; case; channels; charge; chemical; conditions; conservation; continuity; current; devices; displacement; eisenberg; equations; field; flow; law; mass; new; potential; rate; reactions; semiconductor; solutions; systems; theories; theory; time; vacuum; world; york
- Hydrogen Sulphide Corrosion of Carbon and Stainless Steel Alloys Immersed in Mixtures of Renewable Fuel Sources and Tested under Co-processing Conditions by Gergely, András; Locskai, Roland; Szabó, Péter; Krójer, Antal; Kristóf, Tamás (2016) - A greater degree of failure to develop protective sulphide scales was experienced by changing to composition of the biomass fuel sources than the impact of thermal activation between a narrow temperature range at around 100ºC. In accordance with the literature, high free fatty acid contents lead to high corrosion rates accounted for direct corrosion of high alloy steels and assisted solubilisation of corrosion products. SEM-EDS composition (in atomic %) of the corrosion product of sulphide corrosion scales removed from the surface of carbon steel coupons (1.0425) immersed in raw gas oil tested at a temperature of 250 °C and pressure of 90 bar. Keywords: acid; alloys; biomass; carbon; corrosion; corrosion rates; doi; experiments; gas; gas oil; hydrogen; lard; oil; phase; pressure; rates; reaction; scales; sources; steel; steel alloys; sulphide; sulphide corrosion; temperature; time; waste
- Mobile Data Synchronization Methods by Pál, Miklós; Láner, Gábor (2016) - Finally, the third solution is a distributed NoSQL implementation of mobile data synchronization. The last measured value is the size of mobile database after data synchronization. Keywords: application; data; database; mobile; rest; server; service; soap; synchronization; time
- Refrigerator Optimal Scheduling to Minimize the Cost of Operation by Bálint, Roland; Magyar, Attila (2016) - The multiplication of the sample time and the horizon yields to predicted time horizon. The MPT toolbox for the PWA system description uses discrete time models, thus initially the continuous time model must be discretised. Keywords: algorithm; horizon; input; model; refrigerator; size; time
- Modelling a Three-Phase Current Source Inverter by Neukirchner, László; Magyar, Attila (2016) - Keywords: model predictive control, current source inverter, space vector modulation, modelling, simulation 1. Calculating Dwell-Time The dwell time for stationary vectors represents the time that space vectors spend in a sector during TS. Keywords: current; inverter; space; state; switching; time
- Initial Electrical Parameter Validation in Lead-Acid Battery Model Used for State Estimation by Csomós, Bence; Fodor, Dénes; Kohlrusz, Gábor (2017) - Battery model for impulse excitation In this paper, a standard Randles’ model [7-12] was analyzed that consists of charge-transfer resistance, Rct, battery serial resistance, Rs, double-layer capacitance, Cdl, and bulk capacitance, Cb (Fig.1). In the proposed model, a simplified, that is, capacitor-like formula was used for initial battery capacity estimation so it approximates the battery non-linear discharge characteristic linearly. Keywords: battery; current; discharge; impulse; load; model; soc; time; voltage
- Worker Movement Diagram Based Stochastic Model of Open Paced Conveyors by Ruppert, Tamás; Abonyi, János (2018) - In the model F (s)kn denotes the position of kth operator at nth cycle step in sth section of diagram, where the positions are measured from the starting point of the first table. [s] tk(π(n) assembly time of actual the product at kth operator Keywords: conveyor; movement; operator; production; section; table; time
- Investigation of Mixing in Tanks of a Special Geometry by Tarcsay, Bálint Levente; Egedy, Attila; Bobek, Janka; Rippel-Pethő, Dóra (2019) - Keywords: tanks with of special geometry, mixing, flow pattern, transfer function model 1. method, transfer functions were identified for the tank by using the experimental RTD curves. Keywords: fitting; flow; function; model; rtd; tank; time; transfer; transfer function
- Torque Transmission Time-Constant Examination of a Disk-Type Magnetorheological Clutch by Mester, Sándor; Szalai, István (2020) - In order to describe the dynamical properties of the system, time constants were measured at different speeds and magnetic inductions. The Hungarian Journal of Industry and Chemistry TORQUE TRANSMISSION TIME-CONSTANT OF A DISK-TYPE MAGNETORHEOLOGICAL CLUTCH 79 Figure 5: CFitted curve of measurements at a speed of n = 46.5 rpm and a magnetic induction of B = 202 mT Figure 6: Time constants as a function of magnetic induc- tion at different speeds fitting was carried out according to the measurements. Keywords: constants; fluid; magnetorheological; time; torque
- Brownian dynamics simulation of chain formation in electrorheological fluids by Fertig, Dávid; Boda, Dezső; Szalai, István (2020) - Chain length distribution averaged over three time intervals at the beginning (10,000 < t∗ < 25,000), in the middle (25,000 < t∗ < 65,000), and at the end (65,000 < t∗ < 100,000) of chain formation. 95–107 (2020) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2020-15 BROWNIAN DYNAMICS SIMULATION OF CHAIN FORMATION IN ELEC- TRORHEOLOGICAL FLUIDS DÁVID FERTIG*1, DEZSŐ BODA1, AND ISTVÁN SZALAI2,3 1Department of Physical Chemistry, University of Pannonia, Egyetem u. 10, Veszprém, 8200, HUNGARY 2Institute of Physics and Mechatronics, University of Pannonia, Egyetem u. 10, Veszprém, 8200, HUNGARY 3Institute of Mechatronics Engineering and Research, University of Pannonia, Gasparich Márk u. 18/A, Zalaegerszeg, 8900, HUNGARY Brownian dynamics (BD) simulations based on a novel Langevin integrator algorithm are used to simulate the dynamics of chain formation in electrorheological (ER) fluids that are non-conducting solid particles suspended in a liquid that has a dielectric constant different from that of the ER particles. Keywords: average; chain; constant; dipole; doi; dynamics; fig; fluid; formation; length; particles; rij; simulation; time
- MEASUREMENT OF THE SWELLING FORCE OF SOME SODIUM STARCH GLYCOLATE PRODUCTS WITH NEW SOFTWARE by Kelemen, A.; Szöllősi, A.; Zsótér, A.; Pintye-Hódi, K.; Török, C.; Erős, I. (2002) - Table 3 Results of the swelling test Pressure Swelling force force f3 ~3.2% (kN) (N) (s) 5 8.56 0.830 119.13 RSD=5.57 SSG1 10 10.09 0.836 108.82 RSD=9.95 15 12.49 0.858 125.87 RSD=5.46 5 5.45 0.858 66.35 RSD=ll.56 SSG2 10 7.16 0.832 61.67 RSD=8.74 15 14.23 0.830 78.99 RSD=11.09 5 6.96 0.816 48.55 RSD=6.44 SSG3 10 8.18 0.814 47.48 RSD=7.62 15 18.33 0.830 95.03 RSD=3.80 5 6.92 0.864 53.36 RSD=6.21 SSG4 10 8.14 0.808 30.10 RSD=9.74 15 9.59 0.832 33.10 RSD=ll.09 5 9.94 0.832 89.24 RSD=7.36 SSG5 10 13.81 0.819 82.33 RSD=8.58 15 13.49 0.831 40.71 RSD=3.11 5 8.59 0.825 40.38 RSD=0.37 SSG6 10 11.25 $ 0.813 48.88 RSD=4.22 15 11.87 0.816 38.74 RSD=2.85 fJ M(t)=M~{l-exp{-[~] ) } C where Cis the time parameter, f3 is the shape parameter, Mmax is the maximum value of the swelling, M is the swelling at time t, and t0 is the start time. Keywords: disintegrant, swelling force, force-time curve, characteristic swelling time Introduction Disintegrants are always added to conventional tablets in order to promote the break-up of the tablets when they are placed in an aqueous environment. Keywords: force; pressure; ssg; swelling; time
Surface
- RF THERMAL PLASMA TREATMENT OF A FLUE DUST FROM THE SIEMENS-MARTIN PROCESS by Mohai, I.; Szépvölgyi, J.; Tóth, M. (2000) - The high cooling rate in thermal plasmas does not make possible reactions involving liquid or solid phases. However, reduction rate for ZnO was more than 95%, while for Fe20 3 it was only 88% on thermal plasma treatment. Keywords: dust; plasma; powder; reactor; reduction; run; samples; surface
- The Effect of pH on Biosurfactant Production by Bacillus Subtilis DSM10 by Czinkóczky, Réka; Németh, Áron (2020) - [22] Freitas de Oliveira, D. W.; Lima França, Í. W.; Nogueira Félix, A. K.; Lima Martins, J. J.; Apare- cida Giro, M. E.; Melo, V. M. M.; Gonçalves, L. R. B.: Kinetic study of biosurfactant production by Bacillus subtilis LAMI005 grown in clarified cashew apple juice. [13] Fonseca, R. R.; Silva, A. J. R.; De França, F. P.; Cardoso, V. L.; Sérvulo, E. F. C.: Optimizing car- bon/nitrogen ratio for biosurfactant production by a Bacillus subtilis strain. Keywords: bacillus; biosurfactant; doi; fermentation; glucose; production; subtilis; surface; surfactin
- Polyvinylpyrrolidone as a Corrosion Inhibitor for Carbon Steel in a Perchloric Acid Solution: Effect of Structural Size by Benchadli, Abbes ; Attar, Tarik; Messaoudi, Boulanouar ; Choukchou-Braham, Esma (2021) - The use of polymers as corrosion inhibitors has at- tracted considerable attention recently because of their ability to form complexes with metal ions on the elec- trode surface. Sci., 2013, 285, 674–681 DOI: 10.1016/j.apsusc.2013.08.109 [19] Aslam, R.; Mobin, M.; Aslam, J.: Sugar based N,N- didodecyl-N,Ndigluconamideethylenediamine gemini surfactant as corrosion inhibitor for mild steel in 3.5% NaCl solution-effect of synergis- tic KI additive, Sci. Keywords: acid; adsorption; carbon; carbon steel; corrosion; corrosion inhibition; doi; effect; efficiency; inhibition; inhibitors; metal; pvp; solution; steel; steel surface; surface
- Influence of Counter Cation on the Thermal Stability,the Acidity and the Catalytic Properties in the Dehydration of Tert-Butanol over 12-Molybdophosphates by Laila, I. A.; Nashwa, S.; Abed-Elshafy, N. S. (2006) - 28 a HIGHFIELD J. G., MOFFAT J. B., J. Catal. b HIGHFIELD J. G., MOFFAT J. B., J. Catal. Keywords: acid; catal; chem; j. catal; reaction; surface; temperature
- Influence of Mineral Composition in Natural Granite Rocks on Microhardness by Kelemen-Cserta, Eszter; Gyurika, István Gábor (2021) - [5] machined the surface of granite rocks with diamond saw blades and examined their surface roughness. This *Correspondence: kelemen.cserta.eszter@mk.uni-pannon.hu value can even be used for natural granite rocks. Keywords: composition; content; diamond; doi; granite; hardness; minerals; rock; surface
- The Effect of the Cutting Speed on the Surface Roughness When Ball-End Milling by Mgherony, Abdulwahab; Mikó, Balázs (2022) - Keywords: surface roughness, cutting speed, concave surface, convex surface, milling 1. Their findings emphasize the importance of tool orientation on surface roughness during ball-end milling. Keywords: cutting; end; roughness; speed; surface; surface roughness
- Design and Quality Assured Manufacturing of Free Form Metal Prostheses by Selective Laser Melting Technology by Acél, Artúr Benjámin; Falk, György; Dömötör, Ferenc; Takács, János (2022) - During this step, how to fix the implant and what Figure 4: The point cloud generated from the “STL” file Figure 5: Generated surface with an insufficient number of control points its role will be must be taken into account. 29–34 (2021) 34 ACÉL, FALK, DÖMÖTÖR, AND TAKÁCS Figure 17: Surface with the reference net after being scanned by the 3D camera Figure 18: Surface model after smoothing 3. Keywords: fig; figure; manufacturing; model; surface; surface model; workpiece
- Laboratory Measurement of Rolling Resistance Coefficient under Different Conditions by Guba, Sándor; Kocsor, Péter; Vörös, Bálint; Horváth, Barnabás; Szalai, István (2023) - Our aim was to study the dependence of the RRC on various measurement conditions such as velocity, compression force and surface temperature on different surfaces. The standard deviations of the compression force and surface temperature were also calculated. Keywords: drum; force; rolling; rrc; surface; temperature; wheel
- Manufacturing of Large and Polished Ceramic Pistons by Cold Isostatic Pressing by Gerlei, Viktor; Kránicz, Tibor; Korim, Tamás; Jakab, Miklós (2023) - The results show that alumina powder type A with a smaller particle size and larger specific surface area was able to produce a product with the highest bending strength and lowest standard deviation. In relation to the measurements made of the flexural strength, the highest compressive strength was achieved on the pistons produced using alumina powder type “A”. Keywords: alumina; ceramics; doi; figure; pistons; polishing; properties; roughness; surface
- The Effect of Different Accelerators on the Corrosion Protection of a Surface Coating on Spheroidal Graphite Cast Iron (Ductile Iron) by Herbáth, Beáta; Kovács, Kristóf; Jakab, Miklós (2023) - Even though nitrite- based accelerators are the most commonly used and most effective for steel surfaces, the disadvantage of these systems is that the nitrite concentration usually must remain high, especially for spraying processes, thereby polluting the effluent and producing toxic nitrous gases. The Natural Salt Spray test (NSS) according to ISO 9227 is used to test the corrosion resistance of corrosion protection coatings applied to steel surfaces [25]. Keywords: accelerator; cast; coating; corrosion; doi; iron; iso; phosphate; phosphating; samples; steel; surface; test; zinc; zinc phosphate
- Effect of Heat Treatment on the Structure of Self-Assembled Undecenyl Phosphonic Acid Layers Developed on Different Stainless Steel Surfaces by Kocsisné Pfeifer, Éva; Mink, János; Gyurika, István Gábor; Telegdi, Judit (2023) - The adsorption behavior of alkyl phosphonic acids on metal surfaces has been investigated using various techniques, including electrochemical impedance spectroscopy, atomic force microscopy and X-ray photoelectron spectroscopy. Technol., 2002, 123(1), 133–145, DOI: 10.1016/S0924-0136(02)00060-2 [16] Pfeifer, É.K.; Telegdi, J.; Mihály, J.; Németh, Cs.; Drees, M.; Hajba, L.; Mink, J.: Vibrational spectroscopic and theoretical study of undecenyl phosphonic acid for understanding its structure and bonding properties in self-assembling molecular layers formed on various types of steel surfaces, Appl. Keywords: acid; contact; heat; layer; metal; phosphonic; sam; steel; surface; treatment
- Immersion Corrosion Tests to Evaluate Polyaspartic Coatings on Steel by Elhoud, Abdu (2024) - Keywords: polyaspartic coating, immersion corrosion test, steel, zinc phosphate, iron oxide barrier 1. Polyaspartic coatings are still quite novel, originating from polyurethane technology. Keywords: coating; corrosion; immersion; phosphate; steel; surface
- Experimental Investigation of Hardness and Surface Roughness in the Friction Stir Welding of the 6061-T6 Aluminum Alloy by Bouamama, Mohamed; Belaziz, Azzeddine; Elmeiche, Abbes; Elmeguenni, Imane; Elhannani, Abdelhak (2024) - [26] examined how the surface roughness of austenitic stainless steel impacted heterogeneous friction stir welded joints. The objective of this research is to investigate the correlation between welding parameters, specifically rotational speed and feed rate, and the surface roughness (Rz) of welded joints in the case of 6061-T6 aluminum (Al 6061-T6) plates. Keywords: doi; figure; friction; fsw; joints; roughness; stir; surface; tool; welding
- Assessement of the Surface Roughness of Cellulose Ionogel Membranes Using Atomic Force Microscopy by Bakonyi, Péter (2024) - Keywords: cellulose, ionic liquid, ionogel, AFM, surface roughness 1. Introduction Ionic liquids are organic solvents which are non- flammable, thermally stable and good conductors at extremely low vapour pressures capable of carrying out ion exchange. Phys., 2011, 128(1–2), 220–227, DOI: 10.1016/j.matchemphys.2011.02.062 [7] Johnson, D.; Hilal, N.: Characterization and quantification of membrane surface properties using atomic force microscopy: A comprehensive review, Desalination, 2015, 356, 149–164, DOI: 10.1016/j.desal.2014.08.019 Keywords: afm; cellulose; ionogel; membrane; surface
- Comparison of the Wear and Friction Properties of Titanium Nitride-Based Coatings by Ihsan Ali, Osamah; Gyurika, István Gábor; Korim, Tamás; Jakab, Miklós (2024) - The primary aim was to collect data facilitating the selection of surface coatings for unlubricated sliding bearing-surface applications. The adhesion of TiN coatings may also be affected by diffusion of the binder-phase material into the coating. Keywords: coatings; cvd; doi; friction; hardness; layer; properties; roughness; samples; steel; surface; test; ticn; titanium; wear
- The Concept and Practical Challenges of Membrane Gradostat Reactors by Lajtai-Szabó, Piroska; Hülber-Beyer, Éva (2025) - Linking composition of extracellular polymeric substances (EPS) to the physical structure and hydraulic resistance of membrane biofilms, Water Res., 2018, 132, 211–221, DOI: 10.1016/j.watres.2017.12.058 [13] Mohseny Takloo, S.; Kargar, S.; Jalili, H.; Babaei, A.; Amrane, A.: Novel approaches to improve lovastatin production in membrane gradostat bioreactor, Biocatal. 7. Conclusions and perspectives Theoretically, membrane gradostat reactors might be suitable for the production of any microbial secondary metabolites during continuous operation. Keywords: biofilm; doi; gradostat; growth; membrane; metabolites; mgr; microorganisms; production; species; streptomyces; surface
- Potassium Hydroxide-Activated Palm Kernel Shell Carbon for Methylene Blue Adsorption: Reagent Recovery and Regeneration Strategies by Xian, Teow Zi; Amran, Fadina; Arsad, Agus; Zaini, Muhammad Abbas Ahmad (2025) - [24] Wolski, R.; Bazan-Wozniak, A.; Pietrzak, R.: Adsorption of methyl red and methylene blue on carbon bioadsorbents obtained from biogas plant waste materials, Molecules, 2023, 28(18), 6712, DOI: 10.3390/molecules28186712 [25] Somsiripan, T.; Sangwichien, C.: Enhancement of adsorption capacity of methylene blue, malachite green, and rhodamine B onto KOH activated carbon derived from oil palm empty fruit bunches, Arab. MUHAMMAD ABBAS AHMAD ZAINI1-2* 1 Faculty of Chemical & Energy Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, MALAYSIA 2 Centre of Lipids Engineering and Applied Research (CLEAR), Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, MALAYSIA This study investigates the preparation and characterization of activated carbon derived from palm kernel shell, utilizing recovered potassium hydroxide (KOH) as the activating agent. Keywords: ac1; ac2; ac3; adsorption; blue; carbon; doi; dye; koh; methylene; solution; surface
- Ion Transport via Electrosorption by Pethõ, D.; Gáspár, Gy.; Horváth, G.; Liszi, J.; Szakály, R.; Tóth, I. (2008) - Nickel coated nickel electrode was prepared by electrolysis and porous nickel electrode was made by powder metallurgic method. Preparation of nickel coated nickel electrodes by electrolysis Nickel was precipitated on the surface of nickel sheet. Keywords: area; electrode; electrosorption; layer; nickel; potential; solution; surface
- Environmental-Friendly Cutting of Automotive Parts Made of Aluminium Castings by Horváth, R.; Palásti-Kovács, B.; Sipos, S. (2010) - Figure 2: Surface roughness under high speed cutting conditions Cutting conditions: vc = 1000–2000 m/min; rε = 0.4 mm An important factor, to be considered during the design of the insert, is the nose radius, its increase affects favourably the surface roughness. Due to space limitations it is not possible to analyse the tool edge quality (surface roughness values on the rake face and flank land of the inserts, roughness of main cutting edge, edge sharpness, edge radius etc.) a) different nose radii (rε = 0.4 and 0.8 mm) b) different versions of rake face Figure 3: Surface roughness vs. insert geometry Cutting conditions: vc = 1400 m/min a) maximum heights of profile b) profile kurtosis Figure 4: Surface roughness versus relief angle The effect of the tool material The first material, coming into question, is the poly- crystalline diamond (PCD): it has anti-adhesion characteristics, chemical inertness, compared to cemented carbide better abrasive wear resistance and low friction coefficient. Keywords: case; cutting; diamond; edge; insert; profile; roughness; surface; tests; tool; values
- Designing and Manufacturing a Goalie Mask by Horváth, T.; Tamásová, A. (2010) - Figure 3: The modern goalie mask and its parts Designing the new shapes We were inspired by goalies masks used in NHL. Figure 8: Reinforced chin and forehead with carbon-kevlar and the last layer of resin Making the backplate model Ice hockey goalie mask consists of two parts. Keywords: form; goalie; mask; materials; model; prototype; surface
- The Examination of the Boundary Layer Formed on the Nickel Electrode/Solution Interface in the Boundary Layer Separation Method in Plastic Industrial Wastewaters by Pethő-Rippel, D.; Horváth, G. (2010) - It is concluded that it is pointless to exceed the relative velocity of 25 cm/s in the case of nickel pastille electrodes and 10 cm/s in the case of nickelized nickel electrodes. d ec re as e (% ) nickelized nickel electrode nickel pastille elctrode Figure 8: Reduced transfer decrease with nickelized nickel and nickel pastille electrodes The experiments prove that the decrease in reduced transport increases with the increasing flow rates, its extent reaching 100% with nickelized nickel electrodes at 10 cm/s; and at 30 cm/s with nickel pastille electrodes. Keywords: anode; electrodes; flow; layer; nickel; pastille; potential; rate; surface
- Research of Roughness of Hard Turned Bores by Szakács, K. (2010) - Hard turning has been applied in many cases such as producing bearings, gears, axles and other mechanical components. Based on the experimental results, this paper shows and analyse the modification of the surface roughness parameters in case of hard turning and combination machining[1]. Keywords: cutting; grinding; machining; roughness; surface; tool; turning
- Power Spectral Density (PSD) Analysis of Machined Surfaces by Barányi, I. (2010) - The theoretical base of 3D PSD analysis was [2] and [5]. POWER SPECTRAL DENSITY (PSD) ANALYSIS OF MACHINED SURFACES I. BARÁNYI Donát Bánki Faculty of Mechanical Engineering and Safety Technology, Óbuda University 1081 Budapest, Népszínház u. 8., HUNGARY E-mail: baranyi.istvan@bgk.uni-obuda.hu In the first half of the 90s, computers of adequate speed of operation and processing softwares became increasingly available, made it possible to realize 3D surface characterisation. Keywords: analysis; dimension; direction; fig; profile; psd; surface
- Effect of a New Type of Coupling Agent on The Mechanical Properties of Various Multi-Walled Carbon Nanotube/Rubber Composites by Varga, Cs.; Tóth, B.; Gergó, P.; Bartha, L. (2012) - Application of carbon nanotubes (CNT) may represent a breakthrough in rubber matrices either but only small quantities have been introduced because of their relatively high price. If mechanical properties of rubber composites can be improved to a large extent enough then the cost reduction can become less important. Keywords: composites; coupling; effects; fatigue; matrix; mwcnt; rubber; surface; tensile
- Effects of Washing of Raw Material on Properties of Carbon Nanotube Containing Poly(Ethylene-Terephthalate) Composites by Molnár, Tímea; Varga, Csilla; Bartha, László (2014) - SEM graphs of PET sample containing pristine CNT A B Figure 16: SEM graphs of unwashed PET based sample containing 15% CA-2 coupling agent treated carbon nanotube A B Figure 17: SEM graphs of washed PET based sample containing 20% CA-1 coupling agent treated carbon nanotube 37 nanotubes were applied either in pristine or surface treated form. Untreated CNT could be introduced into the polymer melts at 2 wt% level both into washed and unwashed PET raw materials by the same side feeder screw rotational speeds. Keywords: agent; carbon; cnt; composites; coupling; pet; pristine; surface; washing
- Methods of Surfaces Quality Comparison in Mechanical Engineering Applications by Solecki, L. (2011) - The presentation introduces a method for comparing cylinder surfaces of an internal combustion engine and presents an example of the method currently used in automotive engineering applications. Wear analysis of cylinder surfaces of internal combustion engines On the cylinder surface, the wear is less measurable for the change of the surface dimension or shape than for the change of the micro-geometry (irregularity) of the surface. Keywords: comparison; cylinder; perception; points; print; shape; surface; wear
- Method for Determination of the Expected Roughness of Cut Surfaces by Felho, C.; Kundrak, J. (2011) - Keywords: surface roughness, theoretical roughness. Such a method will be introduced in the paper, by the help of which theoretical values of surface roughness can be determined for single point cutting by the help of an analytical model. Keywords: cutting; edge; profile; roughness; surface; tool
- Optimal Tool Selection for Environmental-Friendly Turning Operation of Aluminium by Horvath, R.; Palásti-Kovács, B.; Sipos, S. (2011) - Surface roughness values, made with different compositions polycrystalline diamond tools, were compared, where the dry turning operations were performed with tools with different point angles and nose radii; (the cutting speed was varied in a very wide range (vc = 630–2000 m/min)). This type has an edge rounding off 2 μm and edge roughness value of 1.6 μm respectively. Keywords: case; chipbreaker; cutting; edge; inserts; machining; roughness; surface; turning; values
- Investigation on Coherencies between Residual Stresses and Tool Geometry by Hard Turning by Szabo, G.; Kundrak, J. (2011) - INVESTIGATION ON COHERENCIES BETWEEN RESIDUAL STRESSES AND TOOL GEOMETRY BY HARD TURNING G. SZABO , J. KUNDRAK University of Miskolc, Department of Production Engineering, H-3515 Miskolc, Egyetemváros, HUNGARY E-mail: gergely.szabo@uni-miskolc.hu A wide group of scientists are concerned by the studying of chip removal in hard turning even today. Keywords: hard turning, residual stresses, rake angle Introduction To choose the cutting tool with a proper edge geometry, the research experience gained so far through the examinations of the characteristics of workpieces and tools must be taken into account. Keywords: angle; cutting; rake; stresses; surface; tool; workpiece
- Degradation of organic pollutants in photocatalytic reactors by Ujhidy, A.; Szabó-Bárdos, E.; Horváth, O.; Horváth, A.; Schmidt, K. (2011) - Figure 8: Photocatalytic degradation of oxalic acid on Degussa P25 catalyst, C0(oxalic acid) 0.8 V 0 T O C / m g dm -3 m in -1 VP P90 AE P25 D P25 M PC 500 Figure 9: Initial degradation rates of oxalic acid on different catalysts Photodegradation of formic acid in the pilot equipment In order to investigate the effect of static mixer on the rate of the photocatalytic degradation of pollutants 7·10-3 M solution of formic acid was irradiated in the presence of Degussa P25 catalyst (1 g dm-3) in the pilot equipment. Keywords: acid; adsorption; catalyst; degradation; formic; mineralization; oxalic; p25; rate; reaction; surface; tio2
- Effects of supercritical carbon dioxide on rocks having carbon dioxide storage potential by Lévai, Gy.; Berta, M.; Király, Cs.; Falus, Gy.; Gresits, I.; Székely, E.; Szabó, Cs. (2011) - In the kinetic experiments calcite samples of 0.2–0.3 mm diameter size were mixed in 5 w/w% NaCl solution as model brine. High pressure kinetic experiments A set of experiments with pure calcite samples was run by sampling the liquid phase of the solid – liquid – fluid heterogeneous reaction system. Keywords: brine; calcite; co2; fig; formation; pressure; samples; scco2; storage; surface
- Metal Chloride-Activated Empty Fruit-Bunch Carbons for Rhodamine B Removal by Zaini, Muhammad Abbas Ahmad; Shaid, Mohd Shafiq Mohd (2016) - 129–133 (2016) hjic.mk.uni-pannon.hu DOI: 10.1515/hjic-2016-0016 METAL-CHLORIDE-ACTIVATED EMPTY FRUIT-BUNCH CARBONS FOR RHODAMINE B REMOVAL MUHAMMAD ABBAS AHMAD ZAINI1,2* AND MOHD SHAFIQ MOHD SHAID1 1 Faculty of Chemical & Energy Engineering, Universiti Teknologi Malaysia, Johor Bahru, Johor, 81310, MALAYSIA 2 Centre of Lipids Engineering & Applied Research, Ibnu Sina Institute for Scientific & Industrial Research, Universiti Teknologi Malaysia, Johor Bahru, Johor, 81310, MALAYSIA This study aimed to investigate the adsorptive ability of activated carbons derived from empty boil palm fruit- bunch carbons through metal-chloride activation. Rhodamine B dye was used as a pollutant probe to evaluate the performance of activated carbons. Keywords: activation; adsorption; area; bunch; carbon; efb; fruit; rhodamine; surface
- Surface Energy Heterogeneity Profiles of Carbon Nanotubes with a Copolymer-Modified Surface Using Surface Energy Mapping by Inverse Gas Chromatography by Gerencsér, Fruzsina; Rieder, Norbert; Varga, Csilla; Hancsók, Jenő; Dallos, András (2017) - Howev- er, previous papers have presented surface energy val- ues for functionalized CNTs over unclear surface cover- ages without energetic profiles and surface energy dis- tribution functions, which, therefore, could not give correct information on the surface of the CNTs. However, the anchoring of olefin- maleic-anhydride-ester-amide (OMAEA) up on the MWCNTs surface caused a marked decrement in dis- persive part of surface energy from ~110 mJ/m2 to ~48 mJ/m2 at 353 K. Keywords: carbon; doi; energy; mwcnts; nanotubes; samples; surface; surface energy
- Cold Plasma: the Way to Improve the Repeatability of SALD ICP-MS Analysis by Stiborek, Marek; Preisler, Jan; Shekargoftar, Masoud; Kanick, Viktor; Kelar, Jakub (2018) - 1 µl was required to measure contact angles and 0.2 µl for SALD ICP-MS. 1 shows that the droplets of 0.5 mM trisodium citrate solution that were applied to the substrate surface of PET modified by DCSBD for one second exhibited the greatest contact angle, hence the least wettability; i.e., a longer duration of DCSBD modification causes a higher degree of wettability. Keywords: contact; modification; substrate; surface
- Tribological Behaviour of Polymers in Terms of Plasma Treatment: A Brief Review by Al-Maliki, Hayder; Kalácska, Gábor (2018) - Recently, plasma surface treatment was referred to as the most accepted method of modifying the surface of polymeric materials due to its remarkable stability con- cerning the enhancement of surface properties compared to conventional techniques, in particular, atmospheric plasma treatment which has the ability to operate under ambient atmospheric conditions (in terms of temperature haidrlatif@gmail.com 2 AL-MALIKI AND KALÁCSKA and humidity) and does not require a vacuum [9,11]. 1-11 (2018) hjic.mk.uni-pannon.hu DOI: 10.1515/hjic-2018-0011 TRIBOLOGICAL BEHAVIOUR OF POLYMERS IN TERMS OF PLASMA TREATMENT: A BRIEF REVIEW HAYDER AL-MALIKI ∗1 AND GÁBOR KALÁCSKA1 1Faculty of Mechanical Engineering, Mechanical Engineering PhD School, Szent István University, Páter Károly utca 1, H-2100 Gödöllő, HUNGARY A review to enrich the literature concerning the effect of various plasmas on the tribological behaviour of polymers and monitor the developments of plasma for the modification of polymer surfaces over recent decades using up-to-date data. Keywords: behaviour; conditions; dbd; discharge; doi; friction; plasma; plasma treatment; polymers; pressure; properties; surface; treatment; tribology; wear
Acid
- PREPARATION OF FEED GRADE DICALCIUM PHOSPHATE FROM COMMERCIAL PHOSPHORIC ACID by Yassine, T.; Baidoun, R.; Stas, J.; Al-Merey, R. (2002) - Keywords: commercial phosphoric acid, dicalcium phosphate, feed Introduction In addition to their value as fertilizer, phosphate compounds are essential as phosphorus supplement for living. Phosphate rocks contain different levels of harmful contaminants such as fluoride, hazardous trace elements, and radioactive elements, which could be transferred to phosphoric acid produced by wet process. Keywords: acid; dicalcium; feed; fluoride; phosphate; phosphoric; precipitation; stage; value
- SYNTHESIS OF IMINODIACETIC ACID IN A CASCADE REACTOR by Gulyás, L.; Deák, G.; Kéki, S.; Horváth, R.; Zsuga, M. (2001) - As previous experimental data have shown, the conversion into iminodiacetic acid can be raised by increasing the concentration of glycine (and at the same time, each of the proportion of formation of glycolic acid and the reaction time is decreasing), an amount of concentrated aqueous solution of the calcium salt of monochloroacetic acid equal with the glycine content is added to the mixture, which has been previously freed from ammonia. During the investigation of the industrial synthesis of iminodiacetic acid our important recognition is that glycine, produced together with the desired iminodiacetic acid, can be converted with monochloroacetic acid to iminodiacetic acid after removal of the excess of ammonia from the reaction mixture. Keywords: acid; cascade; iminodiacetic; reaction; reactor
- Enhancement of Oxygen Transfer through Membranes in Bioprocesses by Komáromy, Péter; Bélafi-Bakó, Katalin; Hülber-Beyer, Éva; Nemestóthy, Nándor (2020) - 5–8 (2020) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2020-21 ENHANCEMENT OF OXYGEN TRANSFER THROUGH MEMBRANES IN BIOPROCESSES PÉTER KOMÁROMY *1, KATALIN BÉLAFI-BAKÓ1, ÉVA HÜLBER-BEYER1, AND NÁNDOR NEMESTÓTHY1 1Research Institute on Bioengineering, Membrane Technology and Energetics, University of Pannonia, Some of these membranes are permeable to oxy- gen molecules in the gaseous phase, therefore, it was a breakthrough to apply them for oxygen transfer into the aqueous (liquid) phase [9]. Keywords: acid; aeration; doi; glucose; isbn; liquid; membrane; oxygen
- Separation of Fumaric and Maleic Acid Crystals from the Industrial Wastewater of Maleic Anhydride Production by Papraćanin, Edisa ; Đozić, Abdel ; Mujkić, Ermin ; Hodžić, Maida ; Hodžić, Irma ; Poljić, Belmin; Ramić, Ajla (2022) - Therefore, by washing the distillation column, a suspension is formed in which crystals of fumaric acid as well as a solution of maleic and fumaric acids are present. Scientific and technological developments in the manufacture and use of maleic anhydride as well as maleic and fumaric acids have been reviewed over the past 20 years [4]. Keywords: acid; cooling; crystals; maleic; production; stream; suspension; thiourea; waste; waste stream
- Investigations into the Usage of the Mineral Alginite Fermented with Lactobacillus Paracasei for Cosmetic Purposes by Tóth, Pál ; Németh, Áron (2022) - On the other hand, lactic acid bacteria (LAB) are generally defined as Gram-positive, non-spore-forming, catalase-negative, aerotolerant, acid-tolerant, nutrient- demanding and strictly fermentative organisms that lack cytochromes as well as produce lactic acid as the main end product of carbohydrate metabolism Despite years of research on the production of lactic acid, aesthetic evaluations have not yet been performed. Keywords: acid; alginite; effect; fermentation; hydration; lactobacillus; paracasei; skin
- Extraction of the Food Additive Tartaric Acid Using Octanol, Methyl Isobutyl Ketone, Kerosene, Mustard Oil, And Groundnut Oil by Bhanot, Lalitha; Kumar, Anuj; Shende, Diwakar; Wasewar, Kailas (2023) - Tartaric acid is found in three different chiral structures: dextro tartaric acid or L(+) tartaric acid, levo tartaric acid or D(-) tartaric acid and meso tartaric acid. Separating tartaric acid from wastewater is challenging. Keywords: acid; aqueous; doi; extraction; oil; phase; solvents; tartaric; tartaric acid
- Synthesis of Sugar Esters Using Maize Seed Lipase as a Biocatalyst by Ferdjani, Salim; Selaimia, Ouassila (2024) - Keywords: biocatalysis, plant extract, maize seeds, sugar ester, biosurfactant 1. Sugar esters are non-toxic, biodegradable and nonionic surfactants Keywords: acid; activity; doi; esters; glucose; lipase; msl; reaction; sugar; synthesis
- Experimental Investigation of The Separation of 4-Hydroxybenzoic Acid Employing Natural and Conventional Solvents by P Yadav, Vishnu; Chandrakar, Anil Kumar; Wasewar, Kailas L (2024) - Keywords: 4-hydroxybenzoic acid, separation, natural solvents, conventional solvents, distribution coefficient, extraction efficiency 1. Natural solvents have the potential to avoid toxicity and could be explored for large-scale applications. Keywords: acid; coefficient; corn; distribution; doi; efficiency; extraction; hba; mol; oil; phase; solute; solvents
- How to Avoid Acid Corrosion of Laminated Solar Panels by Replacing the Encapsulant by Patthy, Gergely Balázs; Szigeti, Márton; Závodi-Fodor, Zsófia; Vasáros, Mátyás; Jakab, Miklós (2024) - Conclusions In this article, the causes and effects of the decomposition of EVA foil in solar panels were examined as well as discussed. Keywords: solar panels, EVA, EVA alternatives, Solar POE, acetic acid corrosion 1. Keywords: acid; corrosion; degradation; doi; eva; figure; foil; materials; panels; poe; power; samples; solar; test; wafers
- Experimental Investigation into the Extraction of Nicotinic Acid Using Natural Non-Toxic and Conventional Solvents by Kolhatkar, Vaishnavi; Thakre, Ashwini; Shende, Diwakar; Wasewar, Kailas (2025) - The technique for separating nicotinic acid from fermentation broth has a significant impact on overall production costs. The extraction of nicotinic acid was investigated using various kinds of natural non-toxic and conventional solvents such as sesame oil, rice bran oil, cyclohexane, 1-octanol and methyl isobutyl ketone (MIBK). Keywords: acid; doi; extraction; mibk; nicotinic; oil; phase; solvents
- Stabilization of Acid Tars Present in Oil Residue Lagoons by Nicolae (Tita), Mihaela; Chis, Timur; Onutu, Ion; Tita, Daniel; Bârsan, Doru (2025) - The presence of acid tars in Romania was confirmed as a result of the use of acids in the following industrial processes: a) alkylation of gasoline and the manufacture of detergents Acid tars are easily handled liquids that are extremely stable over time; b) oil refining These wastes are viscous, unstable and become more difficult to pump as they age. Given that the laboratory study analyzed the quality and physicochemical properties of some deposits totaling 80,000 m3 of waste (acid tars, oil residues and acid water) originating from a refinery that ceased to operate in the year 2000, the collected samples were defined as stabilized waste (acid tar). Keywords: acid; acid tar; cement; encapsulation; mixture; samples; stabilization; tars; treatment; waste
- Application of NIR Spectroscopy by Determination of Quality Properties of Vegetable Oils and Their Derivatives by Fülöp, A.; Krár, M.; Hancsók, J. (2008) - Materials and methods Oil samples The 134 different types of rapeseed and sunflower oil samples were obtained from various locations of Hungary. According to the calibration results we found that the created calibration models are suitable for the determination of vegetable oil properties. Keywords: acid; oil; samples; values
- Examination of Medium Supplementation for Lactic Acid Fermentation by Hetényi, K.; Németh, Á.; Sevella, B. (2008) - Using the gluten fraction can substitute the major part of the added yeast extract as nitrogen source, but since there is a need for other microcomponents (vitamins, amino acids etc.) of yeast extract, thus a minimal amount of yeast extract is necessary for lactic acid fermentation. Figure 1: Lactic acid fermentation on wheat starch hydrolysate without gluten and other supplements: (●) glucose; (▲) lactic acid; (■) optical (biomass)density 2. Keywords: acid; extract; fermentation; gluten; l-1; nitrogen; wheat; yeast
- Kinetic Study on Hydrolysis of Various Pectins by Aspergillus niger Polygalacturonase by Kiss, K.; Cserjési, P.; Nemestóthy, N.; Gubicza, L.; Bélafi-Bakó, K. (2008) - 1. 0 0,2 0,4 0,6 0,8 1 1,2 1,4 1,6 0 20 40 60 80 100time (min) re du ci ng s ug ar (g /l) 1 g/l 2 g/l 4 g/l Figure 1: Progress curves of pectin hydrolysis by polygalacturonase from Aspergillus niger (Reaction conditions: pH 4.1, 150 rpm, 50 °C, 0.01 g enzyme, red currant pectin) We have studied the kinetics of pectin hydrolysis by polygalacturonase enzyme from Aspergillus niger in details using a commercially available, low esterification degree LM-5CS pectin substrate and the kinetic parameters were determined [8]. Keywords: acid; hydrolysis; pectin; product; reaction
- Galacturonic Acid Recovery from Pectin Rich Agro-Wastes by Electrodialysis with Bipolar Memranes by Molnár, E.; Nemestóthy, N.; Bélafi-Bakó, K. (2008) - Due to the transport of galacturonate ions and protons, galacturonic acid is formed in acid solution. Average current efficiency [7] for galacturonic acid can be calculated as NI CQFΔ =η where Q is volume flux of acid solution, F is the Faraday constant, ΔC is the concentration difference between acid solution in the feed of the entrance and that in the exit, N is the number of the cell units, and I is the average current. Keywords: acid; current; galacturonic; ions; pectin; solution; voltage
- Enzyme Facilitated Enantioselective Transport of (L)-Lactic Acid through Membranes by Kulcsár, E.; Nagy, E. (2009) - The significance of lactic acid arises from its utility as a monomer for biodegradable solvents and polymers in which the hydroxyl and the carboxyl functional groups permit it to participate in a wide variety of chemical reactions [1]. The reactivity of an alcohol as lactic acid (or its esters or amides) may undergo xanthation reaction with carbon bisulphide, esterification with organic acids and dehdrogenation or oxygenation to form pyruvic acid or its derivatives. Keywords: acid; enzyme; esterification; lactate; lactic; lipase; liquid; membrane; reaction
- New Results on the Field of “White Biotechnology” by Németh, A.; Nagy, G.; Sevella, B. (2009) - The efficiency of lactic acid fermentation is usually given with volumetric productivity (g lactic acid/L broth/hour). In this report we present a kinetic model built up on the basis of several batch lactic acid fermentations. Keywords: acid; adobe; data; fermentation; g·l-1; model; product
- Ethyl-Acetate Synthesis in Gas Phase by Immobilised Lipase by Csanádi, Z.; Kurdi, R.; Bélafi-Bakó, K. (2012) - Therefore, it can be stated that the studied enzyme catalyzed esterification reaction can be carried out more easily and efficiently in gas phase than it other reaction media due to the much more effective mass transfer, low viscosities, and high diffusion coefficients in the gas phase. Structured fiber supports for gas phase biocatalysis, Enzyme and Microbial Technology, 36 (2005) pp. Keywords: acetate; acid; enzyme; ethyl; gas; phase; reaction; substrate; temperature
- Comparative Study on Electrodialysis Systems for Galacturonic Acid Recovery by Bélafi-Bakó, K.; Molnár, E.; Csanádi, Z.; Nemestóthy, N. (2012) - Table 1: Parameters of the two-step ED system for galacturonic acid recovery and desalination Features of the modules Conventional asymmetric ED Combined with BP membrane Membranes 3 cation selective, 2 anion selective 2 cation selective, 1 bipolar Membrane surface area 0.0225 m2 0.0135 m2 Volumes of solutions feed (diluate): 100 ml, concentrate: 150 ml feed (acid): 100 ml, alkali: 150 ml Recirculation rate 32 ml/min 32 ml/min Electrode solution 200 ml 0.5 mol/l Na2SO4 200 ml 0.5 mol/l Na2SO4 Recirculation rate 60 ml/min 60 ml/min Applied voltage 5 V 5 V Processes galacturonate anions and Na cations pass through the membranes to accumulate in the concentrate galacturonate anions remain, BP provides H+, acid formation Na cations pass through the membranes, form alkali solution Final results concentrate rich in Na-galacturonate formation of galacturonic acid and NaOH solutions Table 2: Parameters of the scaled-up complex ED system Features of the module Scaled-up complex module Membranes 10 anion selective, 11 cation selective, 10 bipolar Membrane surface area 0.31 m2 Volumes of solutions feed (diluate): 400 ml, acid: 400 ml, alkali: 450 ml Recirculation rate 380 ml/min Electrode solution 500 ml 0.1 mol/l Na2SO4 Recirculation rate 500 ml/min Applied voltage 36 V Processes both galacturonic anions and Na cations pass through the membrane, formation of acid and alkali solutions Final results recovery and desalination of galacturonic acid in one step Results As a summary, we concluded that electrodialysis is a suitable method for recovery, desalination and purification of galacturonic acid from hydrolysates of various pectins. Keywords: acid; membrane; solution
- Investigation of Hydrogenation of Conventional and High Oleic Acid Content Rapeseed or Sunflower Oils by Solymosi, P.; Kasza, T.; Hancsók, J. (2011) - During the conversion of high oleic acid vegetable oils while applying the favourable process parameter combination the yield was higher and the hydrogen consumption was unequivocally lower. On the basis of our experimental 89 results we obtained that in case of hydrogenation of high oleic acid sunflower and rapeseed oil the oxygen removal mainly took place in the HDC reactions resulting lower hydrogen consumption. Keywords: acid; acid rapeseed; acid sunflower; oil; oleic; oleic acid; pressure; rapeseed; rapeseed oil; sunflower; vegetable; ° c
- Investigation of storage stability of biodiesels by Kovács, S.; Pölczmann, Gy.; Hancsók, J. (2011) - The aim of our research work was to investigate the long term storage stability of biodiesel samples originated from different feedstock. Results showed that the acid number and the water content increased, while the induction period and the iodine number decreased with increasing storage time of biodiesel samples. Keywords: acid; biodiesel; content; fatty; oxidation; results; samples; stability; storage; value
- Manufacture of acid urease by lactobacillus fermentumfermentation by Varga, Zs.; Lövitusz, É.; Csanádi, Zs.; Bélafi-Bakó, K. (2011) - Table 3: Optimal pH of several types of acid urease [8] Optimal pH Type of acid urease pH=3 Acid urease from Lactobacillus reuteri pH=3 Acid urease from Lactobacillus fermentum pH=5 Acid urease from Streptococcus bovis pH=4 Acid urease from Streptococcus mitior pH=4 Acid urease from Streptococcus salivarius pH=5 Acid urease from Lactobacillus ruminis Bacteria and cultivation Lactobacillus fermentum (Fig. 2) belongs to Gram-positive species of bacteria in the genus Lactobacillus. Acid urease was developed for removal of EC or prevention of its formation in beverages, and it was found in several bacteria. Keywords: acid; beverages; carbamate; enzyme; ethyl; fermentum; lactobacillus; urease
- Biolubricant production in ionic liquids by enzymatic esterification by Bányai, T.; Bélafi-Bakó, K.; Nemestóthy, N.; Gubicza, L. (2011) - 5. Figure 3: Influence of the acid/alcohol molar ratio and amount of ionic liquid on the synthesis of isoamyl-oleate 398 Figure 4: Influence of the acid/alcohol molar ratio and amount of enzyme on the synthesis of isoamyl-oleate Figure 5: Influence of the amount of enzyme and ionic liquid on the synthesis of isoamyl-oleate As it shown, increasing amount of ionic liquid results in higher oleate yield, which gives evidence for the advantageous enzyme stabilization effect. Previously biolubricants was successfully produced from fusel oil and isoamyl-alcohol substrates by enzyme catalised esterification, but solution of polar substrates was problematic, that was solved by using ionic liquids. Keywords: acid; alcohol; effect; enzyme; esterification; isoamyl; liquid; oil; oleate; reaction; temperature; yield
- Study on sorption characteristics of citric acid modified rape-seed pellet considering the chemical pre-treatment processes by Németh, D.; Barta, Z.; Labidi, J.; Gubicza, L.; Bélafi-Bakó, K. (2011) - Figure 4: The effect of citric acid modification for the adsorption efficiency of the properly pre-treated rape-seed in the case of copper, zinc and nickel ions (RP/M – rape-seed modified with citric acid; RPE/M – extracted and citric acid modified rape-seed; RPE/SM – extracted and acidified, citric acid modified rape-seed; RPE/LM – extracted and lixiviated, citric acid modified rape-seed) The ground rape-seed pellet is submitted to a proceeding process containing combined pretreatment and citric acid modification, and it resulted in a rape- seed citrate with ion exchange characteristics. Keywords: acid; case; extraction; ions; metal; modification; pellet; pre; rape; seed; treatment
- State-of-the-Art Recovery of Fermentative Organic Acids by Ionic Liquids - an Overview by Tonova, Konstantza (2017) - Keywords: extraction, ionic liquid, organic acid, recovery, re–extraction 1. [9] Matsumoto, M.; Mochiduki, K.; Fukunishi, K.; Kondo, K.: Extraction of organic acids using imid- imidazolium–based ionic liquids and their toxicity to Lactobacillus rhamnosus, Sep. Purif. Keywords: acid; chem; doi; extraction; ils; liquids
- Investigations Into Succinic Acid Fermentation by Németh, Áron (2019) - 9 variables, i.e. 7 inputs (time, lactic acid, acetic acid, propionic acid, glycerol, ethanol, total sugar) and 2 outputs (succinic acid, CDW), were applied to 58 fermentation samples from which 36 were used for training the network, 11 were selected and 11 were used for testing the behaviour of the model. [3] Sauer, M.; Porro, D.; Mattanovich, D.; Branduardi, P.: Microbial production of organic acids: Expand- ing the markets Trends Biotechnol. 2008 26(2), 100–108 DOI: 10.1016/j.tibtech.2007.11.006 [4] Zeikus, J. G.; Jain,·M. K.; Elankovan, P.: Biotech- nology of succinic acid production and markets for derived industrial products Appl. Keywords: acid; co2; fermentation; model; production
Temperature
- ANALYSIS OF PARAMETERS INFLUENCING THE PROPERTIES AND YIELD OF LUBE-OIL EXTRACTION PRODUCTS by Kalaichelvi, P. (2002) - different combinations Tabl~t 1 Extraction resuJts for extraction temperatures of 65 oc and SJ F ratio of 1.4 Feed Mixtures Properties Feed #1 #2 #3 #4 RAFFINATE Yield (Wt %) 80 90 94 70 77 Density, 15 oc 0.9079 0.8856 0.8777 NA NA (gmlml) Pour Point +45 +42 +45 +39 +39 (°C) Kinematic Viscosity (CST) (i) 100 oc 9.35 8.32 8.13 10.22 9.38 (ii) 75 oc 19.31 17.40 15.82 22.33 19.50 Refractive Index, 75 oc 1.48307 1.47081 1.46475 1.49342 1.48471 Wt% Extraction temperatures are fixed based on miscibility temperatures of various combinations of feed mixtures [2,5]. Keywords: extraction; feed; solvent; temperature; yield
- HYDROTREATING OF FULL RANGE FCC GASOLINE by Hancsók, J.; Magyar, S.; Lengyel, A. (2002) - Three main long-run methods are offered for reducing sulphur content of gasoline, each of which results in lower sulphur content of FCC gasoline: reduction by hydrofining of FCC feed, application of new catalysts and catalyst additives in the FCC unit and desulphurisation of FCC gasoline Nevertheless, desulphurisation of FCC gasoline cannot generally be avoided to meet ultra low sulphur specifications of engine gasoline. Keywords: fcc; gasoline; loss; low; number; octane; sulphur; temperature
- SCHEDULING OF MULTIPURPOSE BATCH PROCESSES WITH MULTIPLE BATCHES OF THE PRODUCTS by Holczinger, T.; Romero, J.; Puigjaner, L.; Friedler, F. (2002) - Three main long-run methods are offered for reducing sulphur content of gasoline, each of which results in lower sulphur content of FCC gasoline: reduction by hydrofining of FCC feed, application of new catalysts and catalyst additives in the FCC unit and desulphurisation of FCC gasoline Nevertheless, desulphurisation of FCC gasoline cannot generally be avoided to meet ultra low sulphur specifications of engine gasoline. Keywords: fcc; gasoline; loss; low; number; octane; sulphur; temperature
- A FUZZY LOGIC APPROACH TO THE CONTROL OF THE DRYING PROCESS by Baldea, M. ; Cristea, V. M.; Agachi, P. S. (2002) - The behaviour of three investigated control methods (Fuzzy Logic Control- FLC, Model Predictive Control-MPC and PID control) is presented comparatively. For the ramp sections, as in Fig.8 (detail B on Fig.4), the MPC and PID control proved to be less accurate than FL showing a larger offset. Keywords: air; control; drying; mpc; product; temperature
- PRODUCTION OF ENVIRONMENTALLY FRIENDLY GASOLINE BLENDING COMPONENTS by Holló, A.; Hancsók, J.; Gergely, J.; Perger, J. (2000) - The advantageous properties of isomerate were proved by blend optimisation runs (HPI Gasoline Blending Optimizer, Model-MG) performed with the use of other gasoline blending components (MTBE, n butane, light straight run gasoline, alkylate, FCC gasoline, reformate, hydrocrackate, raffinate, aromatics). In addition to oxygenates numerous, environmentally more friendly motor gasoline blending components (e.g. alkylate, isomerate) are at the refineries disposal to satisfy quality and quantity demands originating from the reduction of benzene and total aromatic content of motor gasolines. Keywords: benzene; blending; content; emission; gasoline; heptane; isomerisation; octane; temperature
- PRODUCTION OF ENVIRONMENTALLY FRIENDLY DIESEL FUELS by Varga, Z.; Hancsók, J.; Kovács, F. (2000) - 330 340 350 360 Temperature, °C Fig.2 Effect of temperature and LHSV on the reduction of the sulphur content The properties of the feedstock and products were determined by standard tests methods: sulphur content by X-ray fluorescence spectrometry, aromatic content by HPLC (MSZ 10907/1998) and nitrogen content by the ASTM D 4629 method. The feedstock was a heavy gas oil fraction having sulphur content of 9300 ppm, nitrogen content of 217 ppm and total aromatic content of 27.5%. Keywords: content; diesel; fuels; lhsv; nitrogen; products; sulphur; temperature
- DESCRIPTION OF A PILOT PLANT FOR THE CO-COMPOSTING OF THE SOLID RESIDUE AND WASTEWATERS FROM THE OLIVE OIL INDUSTRY by Vlyssides, A. G.; Zorpas, A. A.; Karlis, P. K.; Zorpas, G. A. (2000) - A number of vegetation water treatment methods have recently been employed, especially in the Mediterranean area, and these can be divided into Physico-chemical and biological methods. G., BRUNETTI A., PASSINO R. and ROZZI A.: Agricultural Wastes, 1984, 10, 161-175 6. GEORGACAKIS D., KYRITSIS S., MANIOS B. and VLYSSIDES A.: Economic Optimization of Energy Production from olive oil wastewater. Keywords: bioreactor; carbon; composting; oil; olive; temperature; total; vegetation; wastewater
- Temperature and Electric Field Dependence of the Viscosity of Electrorheological (ER) Fluids: Warming up of an Electrorheological Clutch by Mester, Sándor; Szalai, István (2020) - In this paper, the dependence of the viscosity of ER fluids on temperature and electric field strength is examined. Keywords: electrorheological fluid, viscosity, heat effect in ER fluids, ER clutch 1. Keywords: dependence; field; fluids; temperature; viscosity
- Runaway of Chemical Reactors: Parametric Sensitivity and Stability by Szeifert, F.; Chován, T.; Nagy, L.; Abonyi, J.; Árva, P. (2007) - Comparison of runaway criteria The criterion suggested first by Adler and Enig (criterion 1 - van Welsenaere, Froment) can be obtained by differentiating Eq. [K ] Tw=277 278.4 280 Ljapunov in phase space (282.4) 282.4 284 Ljapunov in geometric space (278.4) Inflexion in geometric space (281) 281 282 Figure 5: Criteria in the T – x plane 26 Application for a complex system The primary limitation of different runaway criteria published in the literature is that they are generally derived only for simple or considerably simplified (reaction) systems. Keywords: criteria; criterion; reaction; reactor; runaway; sensitivity; space; stability; temperature
- Investigation of the Heterogeneous Catalytic Transformation of Vegetable Oil/Gas Oil Blends by Krár, M.; Kasza, T.; Tóth, Cs.; Hancsók, J. (2008) - Applying feedstock with higher sunflower oil content (with lower sulphur content) at same operating conditions the sulphur contents of the products were lower, of course. One of the best alternative is to convert the vegetable oils (or other materials containing triglycerides) and/or their blends with gas oil to hydrocarbons rich in paraffins. Keywords: ch2; content; gas; gas oil; oil; sunflower; sunflower oil; temperature
- Investigation of Hydrogenation of Aromatic Hydrocarbons on Pt/Pd/USY Catalyst by Nagy, G.; Varga, Z.; Kalló, D.; Hancsók, J. (2009) - Since 1st January, 2009 the maximum sulphur content of diesel fuels has been 10 mg/kg, the maximum allowable polycyclic aromatic content has decreased from 11% to 8% (in the future 2–4%) and the maximum level of total aromatic content might be specified (about 15–20%) Cetane number, minimum 48/45 48/45 42 48 48 49 51 51 51 Density (kg/m3) 815-860 815-860 815-860 820-860 820-860 820-860 820-845 820-845 820-845 Total aromatic content (%) - - - - - - - - - 15-20* Polycyclic aromatic content (%) - - - - - - 11.0 11.0 8.0 (2.0-4.0***) Sulphur content (mg/kg) 10000 /5000/ 2000 10000 /5000/ 2000 5000/ 2000 2000/ 500/ 100 500/ 100 500 350 50/ 10** 10 The MSZ 1627 diesel fuel standard was overruled in 1999 and the MSZ EN 590 standard became operative. Keywords: bar; gas; hydrodearomatization; temperature
- Production of Bio-Isoparaffins by Hydroisomerisation of Bioparaffins by Kasza, T.; Baladincz, P.; Hancsók, J. (2009) - PÖLCZMANN GY., HANCSÓK J.: Investigation of production of gas oils with high isoparaffin content, Days of Chemical Engineering’09, Veszprém, 21- 23. The bio gas oil is a promising product that is a fuel with high isoparaffin content in the gas oil boiling range, which can be produced by the catalytic hydrogenation of different triglycerides. Keywords: content; lshv; products; temperature
- Fuel Production from Triglycerides Containing Gas Oils by Tóth, Cs.; Baladincz, P.; Hancsók, J. (2009) - To overcome these problems and to attain better quality, the alternative is the chemical conversion of triglyceride based feeds, mainly hydrocarbons rich in paraffins, which products can be utilized in Diesel- engines mixed with diesel gas oil or directly. The objective of our research work was to investigate the production of diesel fuel with excellent quality and/or of diesel fuel blending component by heterogeneous catalytic conversion of gas oil fraction containing 75% sunflower oil. Keywords: diesel; figure; gas; oil; products; temperature; vegetable
- Fuel Purpose Hydrotreating of Vegetable Oil on NiMo/γ-Al2O3 Catalyst by Krár, M.; Kovács, S.; Boda, L.; Leveles, L.; Thernesz, A.; Wáhlné Horváth, I.; Hancsók, J. (2009) - NAGY G., HANCSÓK J., VARGA Z., PÖLCZMANN GY., KALLÓ D.: Investigation of hydrodearomatization of prehydrogenated gas oil fractions on Pt-Pd/H-USY catalysts, Topics in Catalysis, (2007) 45, 195–201 Table 2: The applied analytical methods Properties Method Density EN ISO 12185:1996 Iodine number EN ISO 3961:2000 Acid number EN 14104:2003 Water content EN ISO 12937:2001 Hydrocarbon composition EN 15199-2:2007 Fatty acid composition EN ISO 5509:2000 EN 14103:2003 Results and discussion The main aim of the fuel purpose hydrotreating experiments of sunflower oil was – besides the saturation of double bonds – the removal of the oxygen atom from the sunflower oil and the production of the target fraction (primary C15-C18 n- and i-paraffins) in gas oil boiling range with the highest yield. Keywords: bar; fraction; oil; paraffins; target; temperature; yield
- Production of Depressed Freezing Point Bio Gas Oil from Slaughter House Waste Lard by Kasza, T.; Hancsók, J. (2010) - The reason of this was that the carbeniumions generated on the surface of the catalyst during the isomerization, having lower stability than that of the saturated hydrocarbons, could be cracked more easily at higher temperature and at lower pressure. The reason of this was that at higher temperature the structural trans- formation of the mono-branched paraffins increased, so in consecutive reactions the possibility of the formation of multi-branching was higher. Keywords: content; number; paraffins; pressure; products; temperature
- Investigation of the Oligomerization of Light Olefins on Ion Exchange Resin Catalyst by Kriván, E.; Marsi, G.; Hancsók, J. (2010) - During our experimental work we studied the possibilities of producing motor fuel blending components like these blending components with the oligomerization of the olefin content of light FCC-naphtha – assuming later industrial application – on Amberlyst-15 acidic ion exchange resin type catalyst. In the course of the experiments carried out with acidic ion exchange resin, we successfully produced preferable products at 100–110 °C temperature, 25–30 bar pressure and 0.5–1.0 h-1 liquid hourly space velocity (conversion of olefin was 90–92%, C12+ selectivity 24–30%). Keywords: bar; catalyst; conversion; fcc; light; olefins; pressure; temperature
- Mechanical and Thermal Treatments Influencing the Grain Boundary Character Distribution by Szabó, P. J.; Varga, P. (2010) - But these kinds of circumstances cannot be put into practice, and even at very low friction coefficient values the strain field remains nearly homogeneous only at low strain values. At a high friction coefficient value (m = 0.8) besides the big differences in the values of effective strain, its nearly linear change can be observed at zero height value (z = 0). Keywords: field; friction; grain; specimen; strain; temperature; values
- Examination the Interaction between the Composition of a Theoretical Ecosystem and the Increase in the Atmospherical CO2 Level by Drégelyi-Kiss, Á.; Gimesi, L.; Homoródi, R.; Hufnagel, L. (2010) - Keywords: theoretical ecosystem, feedback, climate modelling, climate change, control Introduction and aims The latest IPCC report [8] points out that a rise of 1.5–2.5 °C in global average temperature makes important changes in the structure and the working of ecosystems, primarily with negative consequences towards the biodiversity and goods and services of the ecological systems (e.g. [1, 3, 13, 17]). There is a continuous cycle and flow of inorganic compounds between the atmosphere and the ecosystems, therefore the anthropogenic affects (such as CO2 emission) strongly modify the activities of ecosystems. Keywords: case; climate; co2; data; earth; ecosystem; effect; feedback; research; temperature
- Optimal Design of High-Temperature Thermal Energy Store Filled with Ceramic Balls by Borbély, T. (2012) - The regenerators are long ago applied, great heat capacity heat stores with solid fill and with short charge-discharge cycle time (10–7200 s). The heat-loss can be reduced by using heat store with small specific surface and by allowing charge from middle to outside and discharge from outside to middle. Keywords: charge; flow; heat; heat storage; heat transport; material; storage material; store; temperature; transport medium
- Investigation of Sensible Heat Storage and Heat Insulation in the Exploitation of Concentrated Solar Energy by Árpád, I. (2011) - This paper analyses this issue and presents a feasible technological solution of how the buildings could continuously be supplied with heat energy from the direct solar radiation and how the energy must be stored as sensible heat storage and how the heat insulation of the heat storage facilities must be planned [1]. heat energy is used for heating and hot water production. Keywords: energy; heat; storage; store; temperature
- ‘By’ Treating of Micro-Alloyed Steels Supported by Integrated ‘IT’ Technology in the Forging Factory of Raba by Tancsics, F. (2011) - They are more stable even at higher temperature than iron carbide, that’s why at the temperature of hot- forming they are forming carbides, nitrides and carbonitrides with carbon and nitrogen contents of steel. With limited austenite overcooling - from normal (designed) heating temperature (~1240 °C) - in air flow, in defined loading order (designed) (Fig. 5) - without air flow, in defined order (Fig. 6) - from higher heating temperature (~1290 °C) - in air flow, in defined loading order - without air flow, in defined order. Keywords: air; cooling; flow; forging; micro; microstructure; temperature
- Isomerization of paraffin mixtures produced from sunflower oil by Kasza, T.; Hancsók, J. (2011) - For example by increasing the severity of operational parameters the cracking reactions become dominant, furthermore the aromatization may also take place over high activity catalysts or at high temperature. Beside them, the bio gas oil is a promising product that is a fuel with high isoparaffin content in the gas oil boiling range, which can be produced by the catalytic hydrogenation of different triglycerides. Keywords: catalyst; content; feedstock; gas; isomerization; oil; products; sapo-11; temperature
- Influence of cooling profile on the product properties in cooling crystallizers by Borsos, A.; Lakatos, B. G. (2011) - Keywords: Cooling crystallization, Population balance model, Moment method, Cooling method, Simulation. Figure 3: Temperature histories of cooling medium in the case of the (c) and (d) cooling methods Evolutions of the zero order moment μ0 are presented in Fig. 4 for different cooling methods. Keywords: balance; cooling; crystalline; crystals; equation; method; model; moment; population; size; suspension; temperature
- Reduced aromatic jet fuels by Eller, Z.; Hancsók, J. (2011) - Our aim was to study the possibilities of producing low sulphur and aromatic content jet fuels in a catalytic way. Aromatic hydrocarbon content of the middle distillate influences value of smoke point decisively. Keywords: bar; content; fuels; hydrogenation; jet; point; products; properties; sulphur; temperature
- Chemical Utilization of Biomass I: Starch Modification in Batch Type Solid Phase Reactor by Dencs, J.; Dencs, B.; Marton, G. (2003) - The laboratory experiments related to the development of starch based flocculants were of two kinds, preparation of polyelectrolytes and testing of the best products in different applications. Production of modified starch in the pilot scale reactor The chemical reaction is performed in the solid phase. Keywords: flocculants; reaction; reactor; starch; temperature; weight
- Investigation of the Deep Hydrodesulphurization of Gas Oil Fractions by Varga, Z.; Hancsók, J.; Nagy, G. (2003) - On the basis of experimental results the advantageous process parameters were determined for producing diesel fuel blending components of sulphur content lower than 50 ppm and lower than 10 ppm. On the basis of experimental results the advantageous process parameters were determined for producing diesel fuel blending components of sulphur content lower than 50 ppm and lower than 10 ppm. Keywords: content; feed; lhsv; ppm; sulphur; temperature
- Conversion of Waste HDPE and LDPE into Feed Stocks in Tube Reactor by Miskolczi, N.; Bartha, L.; Deák, Gy.; Jóver, B. (2003) - Table 3 represents the main properties of each distillate fraction in case of HDPE and LDPE wastes. It was found that LDPE waste degradation products have a little higher –CH3 content, because of their chemical structure. Keywords: cracking; hdpe; ldpe; products; temperature; waste; wsl
- Computer Drawing of Enthalphy-Humidity Charts by Pakowski, Z. (1986) - \ \ < \ \ \ \ \ \ \ a. \ \ \ \ \ \ .. \ \ \~ \ \ \ \ \ N\ \ \ \ \ \ \ \ \ \\ \ \ \ \ \ \ \ \ \ \\ \ \ \ \ \ \ o \ \ cb. 100. gl~~t~'~~\11~~í~~t~1~~1~1~~ís)t~~=jf\~\{t~~~~i\~\i\t~it\~~t~J~~f~~~\~\t~Jt~f~~~~f;j\ \ \ \ \ \ \ \ \ \ \ \ o \ \ \ \ ~. o 200_ ji 400. Keywords: chart; enthalpy; gas; humidity; lines; plotter; temperature
- Vapour Pressure of Ethanol and 1-propanol Binary Mixtures by Talibov, Misirkhan; Safarov, Javid (2016) - Experimental mole fraction x of 1-propanol, and vapour pressure P (in Pa) of a solution of (1-x)C2H5OH + x C3H7OH a Temperature mole fraction of 1-propanol (x) (K) 0.0000b 0.0989 0.1918 0.4034 0.5935 0.7971 0.9038 1.0000c 274.15 1684 1490 1374 1116 897 672 530 515 278.15 2248 1980 1843 1498 1219 902 739 697 283.15 3155 2810 2620 2149 1761 1330 1102 1008 293.15 5842 5390 5023 4186 3442 2670 2260 2034 303.15 10458 9762 9180 7780 6521 5150 4402 3854 Plot of vapour pressure P (in kPa) of a (1-x) C2H5OH + x C3H7OH solution mixture as a function of 1-propanol mole fraction x. ¿, 274.15 K; ¢, 278.15 K; ▲, 283.15 K; �, 293.15 K; ▼, 303.15 K; Ò, 313.15 K; Ì, 323.15 K; ¯, 333.15 K; £, 343.15 K; r, 353.15 K; �, 363.15 K; s, 373.15 K; °, 383.15 K; ⊕, 393.15 K; «, 403.15 K; ¶, 413.15 K, ◐, 423.15 K; x, 433.15 K; ◑, 443.15 K; lines fit to Eqs.(3) and (4). Keywords: ethanol; mole; pressure; propanol; temperature; vapour
- Methyl-Tert-Butyl-Ether Synthesis Reactor Modelling and Optimization Using an Aspen Custom Modeler by Nawaz, Zeeshan (2017) - The heat transfer coefficient of the shell side is expressed as a function of Nu and Re and are both based on the external diameter of the tube, where ɛφ stands for a correction factor accounting for the angle between the coolant stream and reactor tubes: The following five reactions (Eqs.(1-5)) are involved in MTBE synthesis when isobutylene reacts with methanol *Correspondence: zeeshan@sabic.com (MeOH). Keywords: catalyst; coefficient; doi; heat; methanol; model; mtbe; rate; reaction; reactor; synthesis; temperature; transfer
- Application of a Hydrophobic Polymeric Membrane for Carbon Dioxide Desorption from an Mea-Water Solution by Ziobrowski, Zenon; Rotkegel, Adam (2017) - Cal- culated and experimental values of CO2 mass fluxes are Figure 5. The scattering of calculated and exper- imental values of CO2 mass fluxes was within the range of ±25% . Keywords: co2; doi; fluxes; liquid; mass; mea; membrane; temperature
- Formation of Glycidyl Esters During the Deodorization of Vegetable Oils by Bognár, Erzsébet; Hellner, Gabriella; Radnóti, Andrea; Somogyi, László; Kemény, Zsolt (2018) - [13] summarized the data from previous studies and according to this re- view the highest concentrations of GEs in seed oil were found in soybean oil when compared to rapeseed and sun- flower oils. Experimental 2.1 Samples and Measurements Bleached sunflower, rapeseed and soybean oils were sup- plied by Bunge Limited (Bunge Zrt. Keywords: deodorization; esters; formation; ges; oils; temperature
- Thermal model development for a CubeSat by Al Hemeary, Nawar; Jaworski, Maciej; Kindracki, Jan; Szederkényi, Gábor (2018) - Al 6061-T6 uncoated Al 6061-T6 coated Solar cells Specific Heat [J/(kg·K)] 980 980 1600 Emissivity (thermal) 0.08 0.92 0.85 Absorptivity (solar) 0.379 0.09 0.92 Table 2: Material properties of fuel tank. Figure 3: The thermal behavior using 100 % Al during one orbital period ((a) temperatures of the faces and fuel tank, (b) temperature of the fuel tank) (T1, . . . Keywords: faces; fuel tank; heat; interval; satellite; solar; temperature
- LIQUID-SOLID HEAT TRANSFER WITH THE PHASE-CHANGE OF SOLID by Petrescu, S.; Bacaoanu, A. (2002) - Keywords: melting, heat transfer, heat transfer coefficient, melting rate Introduction Technical literature provides a large onumber of papers regarding the heat transfer in liquid - solid systems. S Temperature influence on heat transfer coefficient corresponding to a 60-sec. duration. Keywords: coefficient; heat; melting; model; particle; temperature; transfer
- PARAMETRIC SENSITIVITY OF FREE RADICAL POLYMERIZATION ASSOCIATED WITH GEL AND GLASS EFFECTS by Petrila, C.; Curteanu, S. (2002) - The variation of numerical average polymerization degree caused by £ parameter change; solid line - calculus based on sensitivity functions; dotted line - calculus based on model simulations Conclusions This paper is dealing with parametric sensitivity of isothermal batch bulk polymerization of methyl methacrylate. Using a calculus based on sensitivity functions, the quantitative estimation of the parameter influence on the system state and output variables are made. Keywords: effect; gel; influence; parameters; polymerization; sensitivity; state; temperature; values
- KINETICS AND CHARACTERISTIC CURVE FOR CONVECTIVE AND INFRA-RED CONDITIONS DURING DRYING OF CLAY by Zagrouba , F.; Mihoubi , D.; Bellagi , A.; Szalay , A. (2002) - The concept of characteristic drying curve was checked in order to an overall expression of the drying kinetics. Globally, experimental data presented on the following figures show distinctly: at constant drying rate: period is sufficiently long and covers a large part of drying time. Keywords: air; coefficient; drying; flux; heat; moisture; temperature; transfer
Data
- A NEW VBA SOFTWARE AS A TOOL OF FOOD SENSORY TESTS by Kókai, Z.; Heszberger, J.; Kollár-Hunek, K.; Kollár, G. (2002) - Sensory testing methods can be divided into three main groups: • difference testing methods; • ranking methods • and descriptive methods. Sensory testing is generally considered to be subjective) as it relies on human individuals, instead of 'more accurate' equipments of other research fields (e.g.: analytical chemistry, rheology, etc.). Keywords: analysis; assessors; data; profile; score; software; testing
- IDENTIFICATION OF NONLINEAR SYSTEMS USING GAUSSIAN MIXTURE OF LOCAL MODELS by Abonyi, J.; Chován, T.; Szeifert, F. (2001) - As Eq.(7) and Eq.(3) show, fuzzy models are identical to operating regime based models as the operating region of the local linear models are defined by the normalized rule fulfillments: W; {3i(xk) r (8) l:wi /3;(XA) Fuzzy models use if-then rules to describe the process through a collection of locally valid relationships. Keywords: data; gaussian; identification; model; operating; regime
- ASSESSING IMPACTS OF A HYDROPOWER PLANT: EBRO RIVER, SPAIN by Capel, F. M.; Hervella Rodríguez, F.; García de Jalón Lastra, D.; Sainz de los Terreros, M. (2000) - The great reduction of fish biomass is explained by the loss of the basic food for the principal species. The same as the carp, Carassius auratus prefers slow water habitats, and it was captured by nets only in 1995. Keywords: biomass; data; fish; flow; habitat; mean; nets; reduction; species
- DATA ORGANISATION AND MODELLING EXPERIENCES IN BUDAPEST AIR QUALITY MANAGEMENT by Gyovai, A.; Kiss, I. (2000) - The steps involved in manipulating raw source and emissions data into an ADMS-Urban file Inability to obtain the ideal range and depth of activity data required for using the most accurate emissions factors (such as speed of traffic flows, type and efficiency of combustion unit). - Uncertainties in the geographical resolution at which activity data is available: for instance, data only available at the level of the · city administrative unit, or even pertaining to the entire city, province or country. - Uncertainties associated with primary activity data, including: errors associated with traffic model vehicle flow estimates, under-reporting in fuel sales data, specific deficiencies in the reporting of emissions data from industrial processes. minor road traffic has to be considered as well but in a simplified way, namely treating it as area emission sources. Keywords: air; data; emissions; inventory; quality; sources; traffic; urban
- APPLYING GEOGRAPHICAL INFORMATION SYSTEMS IN WETLAND MANAGEMENT IN THE BALATON-HIGHLANDS NATIONAL PARK by Kováts, N.; Szalay, T. (2000) - In this way area loss can be determined Of different layers of the digitised map, 19th century extension of the wetlands can give useful information, especially in comparison with recent wetland areas (Fig.2). On the contrary, diverse patches of the environment, including different wetlands are distinguished on the investigated aircraft photos but exact identification of these patches, especially of non woody vegetation can be made only in the field. Keywords: area; basin; data; information; inventory; maps; wetlands
- Challenges of Industry 4.0 in the Visegrád Group by Éltető, Andrea (2022) - Keywords: Industry 4.0, Visegrád Group, Foreign Direct Investment 1. In spite of these efforts, statistics show that the Visegrád Group remains underdeveloped in the field of Industry 4.0. Keywords: companies; data; doi; firms; foreign; group; ict; industry; technologies; visegrád
- Building a Reusable Data Model to Support Systematic Layout Planning with Discrete Event Simulation of Flexible Manufacturing Systems by Molnár, Zsolt; Tamás, Péter; Illés, Béla (2022) - A typical product route with the order of operations and the machines (activity points) that are capable of ex- ecuting the process step is shown in Table 2. Capacity • 3D block size parameters (x, y, z) • Logic of supporting services With the help of activity points, the simulation model can be easily built and modified. Keywords: activity; data; design; manufacturing; product; simulation; table
- Interpetable Support Vector Machines in Regression and Classification – Application in Process Engineering by Kenesei, T.; Abonyi, J. (2007) - This paper describes a three-step technique how to use reduction techniques on trained SVM and SVR models to acquire transparent, but accurate fuzzy rule based classifier and fuzzy regression models. These techniques solve two cardinal problems: learning from experimental data by neural networks and support vector based techniques and embedding existing structured human knowledge into fuzzy models. Keywords: data; functions; fuzzy; method; model; number; regression; rule; support; techniques; vector
- Online Learning for Surrogate Model Maintenance by Palotai, Balázs; Kis, Gábor; Chován, Tibor; Bárkányi, Ágnes (2025) - This paper presents an MLOps-aligned online surrogate calibration method that maintains and improves surrogate model accuracy by dynamically incorporating localized operational data. Figure 9: Comparison of the accuracy of the base model and hybrid learning model with regard to the online test data ONLINE LEARNING FOR SURROGATE MODEL MAINTENANCE 53(2) pp. Keywords: accuracy; data; dataset; figure; learning; level; model; online; performance; surrogate
- Telemedical Heart Rate Measurements for Lifestyle Counselling by Salai, Mario; Tuboly, Gergely; Vassányi, István; Kósa, István (2014) - The mean RR interval values and standard deviation of RR intervals are very close to those of the reference device using both the synchronization and data validation algorithms. Two tabs in the top left-hand corner allow the user to switch between synchronization and data validation algorithms. Keywords: algorithm; cardiosport; data; device; error; signal; validation
- Challenges of Enterprise Policy Compliance with Smartphone Enablement or an Alternative Solution Based on Behaviour-based User Identification by Dobos, Sándor; Kovács, Attila (2014) - Association between network nodes could be defined as the connections of the applications (calls, connections, as web access), usually resources are connecting together. • Based on the above elements, network nodes and associations provide the details to calculate the association matrix. Keywords: behaviour; connections; data; device; enterprise; graph; management; mdm; network; nodes; security; set; user
- Comparison of Two Variable Interpolation Methods for Predicting the Vapour Pressure of Aqueous Glycerol Solutions by Szalkai, István; Sebestyén, Attila; Della-Vecchia, Biancamaria; Kristóf, Tamás; Kótai, László; Bódi, Ferenc (2015) - Comparison of interpolation methods for predicting the vapour pressure of aqueous glycerol solutions, Proc. Comparison of interpolation methods for predicting the vapour pressure of aqueous glycerol solutions, Preprint No. 036 (University of Veszprém, Veszprém, Hungary) 1995 math.uni- pannon.hu/~szalkai/Szalkai-1995Preprint-Glic.pdf [6] Kiss B.: Plants oil industry and household tables (Mezőgazdasági Kiadó, Budapest, Hungary) 1988 (in Hungarian) Keywords: data; glycerol; interpolation; method; points; pressure; shepard; solutions
- Selective Removal of Hydrogen Sulphide from Industrial Gas Mixtures Using Zeolite NaA by Kristóf, Tamás (2017) - Gas adsorption simulations were carried out by the standard grand canonical Monte Carlo methodology Molecular simulation predictions for mixture adsorption from two- and three-component gas mixtures containing hydrogen sulphide (H2S), hydrogen (H2) and methane (CH4) are presented. Keywords: adsorption; chem; data; doi; gas; h2s; hydrogen; mixtures; naa; simulation; sulphide; zeolite
- Examination of Innovative High-Throughput Fermentations by Németh, Áron (2017) - This model can describe both anaerobic cell growth on excess sugar with the formation of alcohol and aero- bic cell growth on alcohol as a substrate. Keywords: fermentation, high-throughput, scale-down, online measurement, mathematical model- ling 1. Introduction Developments in fermentations face numerous chal- lenges which may require expensive analytics, media components or special tools to facilitate aseptic work and sampling. Keywords: anaerobic; data; growth; measurements; media; model
- Separation of a Two-Component Steroid Mixture by Simulated Moving Bed Chromatography by Temesvári, K.; Aranyi, A.; Balogh, S.; Bánkuti, Gy.; Csukás, B. (2004) - Analytical Method for Measurement of SMB Samples The samples of SMB experiments were examined by analytical HPLC which consisted of a gradient pump (SpectraSYSTEM P2000), a controller (SpectraSYSTEM SN4000), a light scattering detector (Polymer Laboratories PL-ELS 2100), a thermostat (JET-STREAM Plus) and an injection valve (Rheodyne, 20 µL loop). [mg/(g min)] Specific solvent consumption (ml/mg A) Recovery (%) Purity (%) Isocratic, 8 columns, 4 zones, column connection: 2-2-2-2 SMB-5 36:9 0.7891 0.2429 98.62 100 Isocratic, 16 columns, 4 zones SMB-7 2-6-6-2 36:9 0.8114 0.2376 100 97.46 SMB-8 2-6-6-2 36:9 0.7920 0.2471 99.31 100 SMB-10 3-4-7-2 36:9 0.8065 0.1907 99.25 100 Gradient, 16 columns, 3 zones SMB-11 3-5-8 48:12 1.0175 0.2015 99.86 100 Therefore in the following the main goal was to decrease the specific solvent consumption by changing the column distribution in the four zones of the SMB unit. Keywords: columns; data; experiments; parameters; separation; simulation; smb
- Automated Labeling Process for Unknown Images in an open-world Scenario by Papp, Dávid; Szűcs, Gábor (2019) - The for- mer refers to the detection of images that originate from unknown classes, and the latter includes the detection of unknown images and a labeling process to identify new classes, followed by the incremental learning of these new categories. One way of han- dling detected unknown images is to measure their sim- ilarities and identify new categories. Keywords: algorithm; categories; class; cluster; data; doi; images; number; recognition
- LIDAR-based Collision-Free Space Estimation Approach by Unger, Miklós; Horváth, Ernő; Hajdu, Csaba (2020) - Clustering is the task of divid- ing the population or data points into a number of groups such that the data points in a group are more similar to other data points in the same group than to data points in other groups. 5. Vertices are side points which form the simplified shape of a polygon. Keywords: algorithm; convex; data; line; points; ros; voronoi
- Geospatial Data Manipulation Supporting the Implementation of Driving Simulation Environments by Speiser, Ferenc; Enisz, Krisztián; Fodor, Dénes (2020) - The main advantage of the proposed framework is that if some kind of road network data is available from an area, it is possible to convert it into a road-description format. This paper describes a way of gathering and converting road network information from Open- StreetMap into OpenDRIVE format. Keywords: data; driving; environment; information; road; simulation; software; systems
- XBRL utilization as an automated industry analysis by Suta, Alex; Tóth, Árpád (2020) - Intelligent Archi- tecture for Comparative Analysis of Public Com- panies Using Semantics and XBRL Data. In- ternational Journal of Software Engineering and Knowledge Engineering, 2014, 24(5), 801–823 DOI: 10.1142/S0218194014500314 [6] Joyner, D.: How to Transform XBRL Data into Use- ful Information. Keywords: analysis; automotive; chain; classification; companies; data; financial; industry; journal; sec; sic; suppliers; supply; total; xbrl
- Estimation of Parameters in 3-Parameter Weibull Probability Distribution Functions by Luus, R.; Jamme, M. (2005) - Maximization of the likelihood function given in Eq.(8) yielded with R = 100 in a computation time of 1.49 s the maximum value L = 1.0285396 × 10-139 with parameter values which are very close to those obtained by EIV, as is shown in Table 1. Minimization of the sum of squares of deviations given in Eq.(9) yielded with R = 100 in a computation time of 0.50 s the minimum S = 5.6267167 × 10-2 with parameter values given in Table 1. Keywords: data; parameter
Reaction
- ALKYLATION OF BIPHENYL WITH 1-HEXEN BY USING A CATALYST by Veli, S. (2002) - As shown in Fig.4, biphenyl conversion and monohexyl biphenyl concentration in alkylat increases as the reaction time increases, while di~ and polyhexyl biphenyl concentrations decrease. It was observed that the conversion of biphenyl increases with temperature. Keywords: alkylation; biphenyl; catalyst; hexen; reaction
- MULTIPLICITY OF STEADY STATES AND THE SHAPES OF ITS EXHIBITING IN CATALYTIC REACTIONS KINETICS by Koltsov, N. I.; Keil, F. J. (2001) - Therefore, for describing breakdown it is quite enough to have reaction schemes giving self-crossing of kinetic curves. The purpose of the presented review is the analysis of the existing approaches and mathematical methods for the investigation of the critical phenomena of a type of multiple steady states in kinetics of catalytic reactions Keywords: multiplicity; steady state; hysteresis; self-crossing; breakdown; isola; mushroom; catalytic reaction; kinetics; step scheme. Keywords: b.v; conditions; crossing; fig; koltsov; mss; oxidation; reaction; russian; scheme
- MECHANISMS OF AMMONIA-SYNTHESIS REACTION REVISITED WITH THE AID OF A NOVEL GRAPH-THEORETIC METHOD FOR DETERMINING CANDIDATE MECHANISMS IN DERIVING THE RATE LAW OF A CATALYTIC REACTION by Fan, L.T.; Bertók, B.; Friedler, F.; Shafie, S. (2001) - The methodology presented above has been applied to two sets of available elementary reactions, one comprising elementary reactions (1) through (10) together with elementary reaction {14) in Table 1, function pFreedom(x, inc, exc) begin if XEOF(E) or v-(x)ninc=0 end; then return I v-(x)\inc\exc I else return I v-(x)\inc\exc l-1; function cFreedom(y, inc, exc) begin ifyEot(E) or v\y)ninc=0 then return J v+(y)\inc\exc) else return I v+(y)\inc\exc l-1; end; Fig. Synthesizing the networks of elementary reactions is exceedingly convoluted due to the combinatorial complexity arising from the fact the number of elementary reactions involved usually far exceeds that of available elementary balances, which is only 2 for the ammonia synthesis. Keywords: end; mechanisms; network; pathway; reaction; set; steps
- COMPUTER CONSTRUCTION OF CHEMICAL REACTION MECHANISMS by Alexeev, B.V.; Koltsov, N.I.; Keil, F.J. (2001) - =wn =wzl =w31 =0 allows one to write down a mechanism and chemical formulas of reactants and intermediate substances in the following form N0+2X1 = X 2 +X3 , CO+X2 = = C02 + X 1 , NO+X3 =N2 +X 2 , X 1 =Zp X 2 =Z1P2P31 , X 3 =Z1Jl-Pz- 1~, CO=P3 ,C02 =P2,NO=~,N2 =~2P2-2~2 • This is a mechanism l.N0+2K =KO+KN, 2. CO+ 2CO + 2NO = 2C02 + N2 Reaction mechanism Example 2. 1. b11CO +b12C02 +b13 NO +b14N2 + 2X1 = Three-step mechanism 1. 2X1 = X 2 + X3 , 2. X 2 =X1 , is supposed to be realized for the reaction 2CO + 2NO = 2C02 + N 2 . Keywords: chemical; matrix; program; reaction; scheme; step; stoichiometric
- ESTIMATION OF STEADY STATES NUMBER OF ONE-ROUTE CATALYTIC REACTIONS by Patmar, E. S.; Alexeev, B. V.; Koltsov, N. I.; Keil, F. J. (2001) - This means that the existence of one reversible step in reaction schemes having a great number of ISS is not only a necessary [6] but also a sufficient condition. 87-90 (2001) ESTIMATION OF STEADY STATES NUMBER OF ONE-ROUTE CATALYTIC REACTIONS E. S. PATMAR, B. V. ALEXEEV, N. I. KOLTSOV and F. J. KEIL1 (~epartment of Physic~ Chemi~try o! Keywords: iss; number; reaction; steps
- Production of Chiral (S)-2-Phenyl-1-Propanol by Enantioselective Biocatalysts by Lajtai-Szabó, Piroska; Bagó, Tímea Brigitta; Nemestóthy, Nándor (2022) - Whole- cell biocatalysts ensure the optimal environment for the enzyme, thereby providing a quite stable system. Pap., 2002, 56, 52–56 URL [15] Manevski, N.: Activity and enzyme kinetics of human UDP-glucuronosyltransferases: Studies of psilocin glucuronidation and the effects of albumin on the enzyme kinetic mechanism, Academic dis- sertation, University of Helsinki, 2013 URL [16] Rapp, C.; Pival-Marko, S.; Tassano, E.; Nidet- zky, B.; Kratzer, R.: Reductive enzymatic dy- namic kinetic resolution affording 115 g/L (S)-2- phenylpropanol, BMC Biotechnol., 2021, 21, 58 DOI: 10.1186/s12896-021-00715-5 Hungarian Journal of Industry and Chemistry https://doi.org/10.1016/j.fct.2011.10.023 https://doi.org/10.1186/s12896-021-00715-5 https://doi.org/10.1007/978-3-642-17907-5_5 https://doi.org/10.33927/hjic-2020-22 https://doi.org/10.1073/pnas. Keywords: activity; adh; cell; cofactor; enzyme; horse; kinetics; liver; reaction; substrate
- Population Balance Modelling of Crystallisation Processes by Lakatos, B. G. (2007) - Simulation runs have been carried out to investigate the influence of micromixing and the interactions of micromixing and chemical reaction on the properties of crystal population produced. coefficient of crystal growth rate, (m/s)⋅(m3/kg)-g kr reaction rate coefficient, l/mol s kV volumetric shape factor L crystal size, m n population density function of crystals nucleation kr=40 kr=0.4 kr=1.0 μ 0 μ 1 μ 1 ( ) cba mmm ωωω Keywords: balance; chemical; crystals; elements; fluid; micromixing; model; nucleation; population; rate; reaction
- Preliminary Evaluation of a Recyclable Copper(I) Iodide/[BMIM][BF₄] Catalytic System for the Synthesis of N-Benzyl 17-Spiro-5′-oxazolidin-2′-ones with the Estrane Skeleton by Ispán, Dávid; Küzdő, Áron; Gecse, Réka; Vágvölgyi, Veronika; Ulbert, Olga; Kovács, Margit; Skoda-Földes, Rita (2025) - molecules24071241 [26] Song, Q.-W.; Liu, P.; Han, L.-H., Zhang, K.; He, L.- N.: Upgrading CO2 by incorporation into urethanes through silver-catalyzed one-pot stepwise amidation reaction, Chin. J. Chem., 2018, 36(2), 147–152, DOI: 10.1002/cjoc.201700572 101–106 (2025) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2025-24 PRELIMINARY EVALUATION OF A RECYCLABLE COPPER(I) Keywords: catalyst; chem; co2; cui; doi; mmol; reaction; steroidal; synthesis; table
- Thermal Cracking of Recycled Hydrocarbon Gas-Mixtures with High Olefins Concentrations in the Feed: Operational Analysis of Industrial Furnaces by Gál, T.; Lakatos, B. G. (2007) - [17,18] studied and presented coke formation rates that influence the online operation period of cracking furnaces. 42 Experimental: Application and presentation of simulated results Having validated the model, series of simulations were performed with the purpose of examining the effect of different feed components on product yields. Keywords: coke; cracking; engineering; feed; froment; furnace; gas; radiant; reaction; yield
- Role of Catalyst Support (CS) in the Growth of Multi-Walled Carbon Nanotubes (MWCNTs) by Szentes, A.; Horváth, G. (2008) - If the interaction is strong, a metal particle does not budge from catalyst support. If the interaction is weak, a metal particle budge from catalyst support and growing of the tube starts from this point. Keywords: carbon; catalyst; flow; nanotubes; reaction; support
- Development of a Reaction Structure Identification Algorithm by Kontos, János; Tóth, Lászó Richárd; Varga, Tamás (2014) - In our case, the identification means the selection of reaction steps that can take place in the reactor. We defined a quantitative measure to check the correctness of the identified kinetic parameters as the mean average difference between the known and the identified reaction rate constants: MAE = 1 Ndr k̂l − kl l=1 Ndr ∑ (15) where Ndr is the number of reactions in unknown CRN; l identifies the current reaction rate constant; k̂ is the reaction rate constant value what we are looking for, such as the last column in Table 1 for CRN01. Table 4 presents the number of reaction steps in the unknown CRN (Ndr), the number of components (Nc) in the system, the number of the possible reaction steps (Nr) as a representation of the size of the reaction set, if the algorithm can find the perfect reaction steps or not, and MAE values when available from Eq.(15). Keywords: algorithm; components; crn; identification; reaction; steps
- Oligomerization of Izobutene in the Presence of Ionic Liquid – Based Catalysts by Fehér, C.; Skoda-Földes, R.; Kriván, E.; Hancsók, J. (2011) - Supported ionic liquids: versatile reaction and separation media, Top. [12] Generally, ionic liquids (ILs) have gained increasing attention with multiple applications in synthesis and catalysis. Keywords: catalysts; isobutene; liquids; oligomerization; presence; reaction; run; selectivity; silp-1
- Enhanced Use of Renewable Resources: Transesterification of Glycerol,the Byproduct of Biodiesel Production by Herseczki, Z.; Marton, G.; Varga, T. (2011) - In this study synthesis of glycerol carbonate from glycerol and dimethyl carbonate was investigated. Keywords: biodiesel, glycerol, glycerol carbonate Introduction Crude glycerol is a considerable by-product of biodiesel production. Keywords: biodiesel; carbonate; dimethyl; glycerol; methanol; model; parameters; product; reaction; reactor; synthesis
- Application of models with different complexity for a stirred tank reactor by Egedy, A.; Varga, T.; Chován, T. (2011) - The perfectly mixed vessel models and compartment models were solved in MATLAB/SIMULINK program package. The perfectly mixed vessel models and compartment models were solved in MATLAB/SIMULINK program package. Keywords: cfd; compartment; design; impeller; models; parameters; reaction; reactor; tank
- Non-equilibrium Model and Experimental Validation for Reactive Distillation by Rouzineau, D.; Meyer, M.; Prevost, M.; Reneaume, J. M.; Druart, F. (2003) - Discretisation is used to write the bulk phase equations with the set of model equation, Newton’s method and homotopy continuation are used. The boundary values which must thus check these equations are the molar fractions and enhancement of equilibrium reaction. Keywords: column; equations; equilibrium; flow; liquid; mass; model; reaction; vapour; ; ; ;
- Strong Reachability of Reactions with Reversible Steps by Virágh, Eszter; Kiss, Bálint (2018) - Consider a system of R reaction steps and with M species (R,M > 0). Consider a reaction with M species and R reaction steps. Keywords: controllability; matrix; reachability; reaction
- Production of a Biolubricant by Enzymatic Esterification: Possible Synergism between Ionic Liquid and Enzyme by Bedő, Zsófia; Bélafi-Bakó, Katalin; Nemestóthy, Nándor; Gubicza, László (2018) - Keywords: synergistic effect, ionic liquid and microwave heating, biolubricant production, enzyme reuse 1. In the experiments with recycled enzyme it was found that ionic liquid maintained the enzyme more effectively, as if it was immobilized by it: the enzyme managed to maintain its activity and recycling ability. Keywords: biolubricant; doi; enzyme; heating; irradiation; liquid; microwave; production; reaction
- Starch Citrate as an Ion Exchange Material – Preparation and Investigation by Fajd, E.; Marton, G. (2004) - In further experiments the effect of bead size and the effect of the pH of solution on ion binding capacity was examined and preliminary column experiments were carried out to see how binding and regeneration steps work out in a glass column. 2/1 CA/starch ratio can be considered as an optimal mix composition beyond which no increase in ion binding capacity was experienced. Keywords: binding; capacity; citrate; exchange; reaction; starch
- High Performance Catalytic Tubular Membrane Reactors Owing to Forced Convective Flow Operation by Keil, F. J.; Flügge, U. (2005) - Palladium membranes were the first to be used in catalytic membrane reactor applications because of their specific H2 permselectivity. Keywords: Membrane reactor, forced convective flow, short-contact-time reactor, hydrogen peroxide decomposition *Contact information: E-mail: keil@tu-harburg.de Introduction Membrane reactors combine reaction and separation in a single unit operation. Keywords: catalyst; conversion; fig; flux; h2o2; inner; membrane; palladium; reaction; wt-%; ∂ +; ∂ ∂
- ON THE NON-LINEAR MASS TRANSFER THEORY by Boyadjiev, C. (2002) - Keywords: non-linear effects, Stephan flow, Marangoni effect Introduction A theoretical analysis of non-linear mass transfer has been developed in [1]. In the case of absorption of C02 in H 20 and temperature change because of chemical reaction, the order of the velocity v0 can be determined: (45) 18 In cases of non-linear mass transfer, characteristic scales have to be introduced into (34): Keywords: flow; linear; liquid; mass; non; reaction; transfer
- VARYING POROSITY KINETIC MODEL FOR DIRECT AND REACTIVE SOLID-LIQUID EXTRACTION by Seikova, I.; Mintchev, A. (2002) - A mathematical model is presented accounting for the effects of porosity increase during extraction from vegetable materials. Mathematical model The overall process of extraction with simultaneous chemical reaction involves consideration of the following phenomena: 96 (a) chemical conversion of insoluble compound that is initially adsorbed or chemically bounded in a solid to soluble reaction product, prior to its diffusion through the pore space; (b) parallel release of all-soluble compounds initially present accompanied by additional solvent penetration and porosity increase. Keywords: extraction; increase; phase; porosity; reaction; reactive; solid; solvent; volume
- THE COMPUTER ASSISTED SYNTHESIS FOR OPTIMAL HEAT EXCHANGER NETWORK AT STYRENE POLYMERISATION by Diaconescu, R.; Tudose, R. Z. (2002) - [3, 4] presents and analyses 142 works for the synthesis of heat exchanger networks. In this work, a method based on balance calculation for synthesizing optimal heat exchanger networks is presented. Keywords: heat; heat exchanger; network; reaction; reactor; transfer
Gas
- A DESIGN FOR PHOTOCHEMICAL DESULFURIZATION AND SOLVENT EXTRACTION FOR LIGHT OIL by Mohamed, A. I.; Xian, S. B.; Qing, C. (2002) - After extraction with acetonitrile the sulfur content in gasoline decreased from 316 ppm to 47.7 ppm, and that in light gas oil from 988 ppm to 101.2 ppm or with 84.9 and 89.75 %, respectively. The present invention relates to a method of a design suggested for a desulfurization of light oils through organic two phase liquid-liquid extraction, photochemical oxidation and photodecomposition of the sulfur compounds, using a high pressure mercury lamp. Keywords: acetonitrile; extraction; gas; gasoline; light; oil; solvent; sulfur
- INVESTIGATION OF THE PRODUCTION OF GAS OIL OF LOW AROMATIC CONTENT by Hancsók, J.; Varga, Z. (2002) - The properties of the feedstock and products were determined by standard test methods: sulphur content by X-ray fluorescence spectrometry, aromatic content by HPLC. Studying the effect of temperature on the reduction of aromatic content in case of LHSV o~s and 0.8 b1 , Table 4 Summary of the results of the advantageous experiments Properties Experiment AM/I AM/2 AM/3 AM/4 Process conditions Temperature, oc 280 280 300 300 Pressure, bar 40 40 40 40 LHSV,h'1 0.5 0.8 1.2 2.0 H2/HC, dm3 /dm3 600 600 600 600 Yield,% 99.6 99.7 99.5 99.6 Product quality Density, kg/m3 810 811 811 813 Sulphur content, <2 ppm <2 <2 <2 Aromatics, % mono 0.5 1.6 2.9 3.6 di 0.08 0.09 0.1 0.4 poly 0.05 O.D7 0.08 0.09 Keywords: aromatic; content; diesel; fuels; gas; oil; products; quality
- ADVANTAGES AND DISADVANTAGES OF DIFFERENT SAMPLING TECHNIQUES FOR SAMPLING VOLATILE ORGANIC HYDROCARBONS IN AIR by Tolnai, B.; Gelencsér, A.; Prümke, H.; Möller, D.; Becker, H.; Dostler, M.; Hlavay, J.; Mészáros, E. (2000) - Today, a wide range of GC compatible air sampling techniques is available. In July and August 1998, air samples were collected over Berlin (Germany) on board of an airplane using stainless steel canisters V = 800 cm3 , p = 3 bars. Keywords: air; analysis; benzene; compounds; gas; hydrocarbons; sample; sampling; veszprem
- Modelling of the Pyrolysis Zone of a Downdraft Gasification Reactor by Kákonyi, Márta; Bárkányi, Ágnes; Chován, Tibor; Németh, Sándor (2021) - Three separate zones are located in downdraft gasification reactors: the pyrolysis, oxidation and reduction zones. Hungarian Journal of Industry and Chemistry MODELLING OF THE PYROLYSIS ZONE OF A DOWNDRAFT GASIFICATION REACTOR 75 Figure 3: Evolution of molar quantity a) and weight percentage b) as a function of temperature Table 4: Gas composition as a function of temperature Temperature [°C] 200 300 400 500 600 700 Molar quantity Keywords: composition; gas; kinetic; mass; model; parameters; pyrolysis; waste; zone
- Membrane Unit for Integrated Gas Separation – Membrane Bioreactor (GS-MBR) System by Pientka, Zbyněk; Peter, Jakub; Válek, Robert (2022) - One relatively easy solution to this problem might be the utilization of gas separation membrane modules given their low energy consumption, simple operation and ease of upscaling. 1. 2.3 Development of HF membrane modules The HC1 HF membrane mini-module was prepared by fixing 10 − 20 fibers into the Swagelok tube fitting using https://doi.org/10.33927/hjic-2022-04 mailto:pientka@imc.cas.cz 16 PIENTKA, PETER AND VÁLEK Figure 1: The spinline used for the fabrication of HF membranes 3M of the epoxy resin DP100. Keywords: co2; fibers; gas; membrane; module; pressure; separation; unit
- Separation of Dissolved Gases from Aqueous Anaerobic Effluents Using Gas-Liquid Membrane Contactors by Visnyei, Merve; Bakonyi, Péter; Nemestóthy, Nándor; Bélafi-Bakó, Katalin (2022) - [7], [16] also reported that the CH4 concentration is diluted in the outlet gas in the case of high gas flow rates, which was also observed in this study. Sweep gas flow rate (mL/min) CH4 (LF:15) CO2 (LF:15) SEPARATION OF DISSOLVED GASES 50(2) pp. 23-26 (2022) 25 Keywords: ch4; co2; flow; flow rate; gas; rate; recovery
- Investigation of the Pyrolysis of Animal Manure in a Laboratory-Scale Tubular Reactor: The Effect of the Process Temperature and Residence Time by Fernandez, Maria Elena Lozano; Tomasek, Szabina; Fáyköd, Csaba; Somogyi, Andrea (2022) - As is depicted in Fig.7, at lower temperatures (300 or 500°C) and an N2 flow rate of 1dm3/h, the calorific value of the gas mixture was higher (~30 MJ/m3), meanwhile, at higher N2 flow rates, the heating value of the gaseous product was about 15 MJ/m3 at the same temperatures. 27-33 (2022) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2022-15 INVESTIGATION OF THE PYROLYSIS OF ANIMAL MANURE IN A LABORATORY-SCALE TUBULAR REACTOR: THE EFFECT OF THE PROCESS TEMPERATURE AND RESIDENCE TIME MARIA ELENA LOZANO FERNANDEZ1, SZABINA TOMASEK1*, CSABA FÁYKÖD2 AND ANDREA SOMOGYI3 1 Research Centre for Biochemical, Environmental and Chemical Engineering, Department of MOL Hydrocarbon and Coal Processing, University of Pannonia, Egyetem u. 10, Veszprém, 8200, HUNGARY 2 Felső-Bacska Storage Windpark Ltd., Arany János út 200, Fadd, 7133, HUNGARY 3 Solver Unio Ltd., Ábel Jenő u. 8, Budapest, 1113, HUNGARY This paper focuses on the pyrolysis of animal manure in a laboratory-scale tubular reactor between 300 and 900°C at nitrogen flow rates of 1 and 5 dm3/h. Keywords: dm3; doi; flow; gas; manure; product; pyrolysis; rate
- Formaldehyde Resin as a Solid Fuel and Activated Carbon by Faizal, Azrul Nurfaiz Mohd ; Zaini, Muhammad Abbas Ahmad (2024) - The elemental composition of carbon, hydrogen, nitrogen and sulfur in resin materials was measured by an Elementar vario MICRO Cube (Germany). The calorific values of resin materials are summarized in Table 1, which range from 23.6 to 29.3 MJ/kg, comparable with typical solid fuels such as anthracite coal and dried firewood with values of 32.5 and 21.7 MJ/kg, respectively. Keywords: carbon; doi; figure; film; formaldehyde; gas; koh; materials; resin
- Study of Green Hydrogen-Air Mixture Formation in a Closed Chamber With a Given Composition by Shypul, Olga; Garin, Vadym; Myntiuk, Vitalii; Egedy, Attila (2024) - The obtained simulation results As a result of CFD modeling, the velocity fields of gas flows, components of gas mixtures and volume fractions inside the chamber were determined. Based on the specific requirements of the researched technology, a mathematical model for generating fuel mixtures was developed, which determines the characteristics of a multi -component gas mixture while the working chamber is filling and during the holding period after the gas supply has stopped. Keywords: air; chamber; figure; fuel; fuel mixture; gas; hydrogen; mixture
- Investigation and Production of Bioethanol/Gas Oil Emulsions by Marsi, G.; Nagy, G.; Hancsók, J. (2008) - Se pa ra te d bi oe th an ol , cm 3 20°C 3°C 1°C Temperature, °C Figure 2: Stability of bioethanol/gas oil emulsions as a function of temperature (without additive, 15 v/v% bioethanol) 0 2 4 6 8 10 12 14 0 5 10 15 20 25 Concentration of biodiesel in base gas oil, v/v% Se pa ra te d bi oe th an ol , c m 3 20°C 3°C 1°C Temperature, °C Figure 3: Stability of bioethanol/gas oil emulsions as a function of temperature (1% additive, 15 v/v% bioethanol) 0 2 4 6 8 10 12 14 0 5 10 15 20 25 Concentration of biodiesel in base gas oil, v/v% Se pa ra te d bi oe th an ol , c m 3 20°C 3°C 1°C Temperature, °C Figure 4: Stability of bioethanol/gas oil emulsions as a function of temperature (2% additive, 15 v/v% bioethanol) 0 2 4 6 8 10 12 0 5 10 15 20 25 Concentration of biodiesel in base gas oil, % Se pa ra te d bi oe th an ol , c m 3 Without additive 1% additive 1,5% additive 2% additive Figure 5: Stability of bioethanol/gas oil emulsions as a function of quantity of additive (temperature: 20 °C, bioethanol content: 15 v/v%) 0 50 100 150 200 250 300 350 400 0 20 40 60 80 100 Quantity of distillated product, ftf% T em pe ra tu re , ° C Base gas oil Base gas oil + 5v/v% bioethanol Base gas oil + 10v/v% bioethanol Base gas oil + 15v/v% bioethanol Figure 11: Change of the distillation properties of bioethanol/gas oil and/or biodiesel emulsions as a function of bioethanol content (biodiesel content of base gas oil: 5 v/v%) 40 44 48 52 56 Base gas oil 2 v/v% bioethanol 4 v/v% bioethanol 6 v/v% bioethanol 8 v/v% bioethanol 10 v/v% bioethanol C et an e nu m be r Without biodiesel 5v/v% biodiesel Figure 12: Change of cetane number of bioethanol/gas oil and/or biodiesel emulsions as a function bioethanol content (biodiesel content of base gas oil: 5v/v%) Keywords: base; biodiesel; bioethanol; emulsions; gas; oil
- Expanding Feedstock Supplies of the Second Generation Bio-Fuels of Diesel-Engines by Baladincz, P.; Tóth, Cs.; Hancsók, J. (2010) - Besides the examination of the reaction parameters (temperature: 360 °C, pressure: 80 bar, LHSV: 1.0 h-1 , H2/feedstock ratio: 600 Nm3/m3) which were found to be congenial for the catalytic conversion of vegetable oils for the conversion of the different, respectively lard or vegetable oil containing (0–10–20–30–50–100%) gas oil feedstocks we investigated the convertibility of the triglyceride part and the effect of the feedstock on the quality and the quantity of the product, furthermore the effect of the triglyceride in the feedstock on the desulphurisation, denitrification and dearomatisation. During our experimental work we examined the possibilities of the catalytic hydrogenation of mixtures of gas oil and lard or vegetable oil respectively, on NiMo/Al2O3 catalyst. Keywords: bio; content; feedstock; fuels; gas; gas oil; lard; oil; sunflower; sunflower oil; triglyceride
- Development of CFD Based Mathematical Models to Study Heterocatalytic Systems by Rádi, Gy.; Varga, T.; Chován, T. (2010) - The pellet by pellet model is working as a network of pellet models. Different ways for aggregating pellet models were compared and evaluated applying COMSOL Multiphysics [1]. Keywords: bed; catalyst; comsol; fig; flow; gas; model; pellet; phase; reactor
- Production of Gas Oil Components from Waste Fats by Baladincz, P.; Ludányi, A.; Leveles, L.; Hancsók, J. (2012) - Hence, during the experimental work, our aim was to investigate the possibilities of the production of bio gas oil and bio gas oil containing gas oils on waste fat basis via the hydroconversion of waste rancid lard itself and as a 50% mixture with gas oils. Experimental During the experimental work our aim was to investigate the possibilities of bio gas oil and bio gas oil containing gas oils on waste fat basis via the hydroconversion of waste rancid lard in itself and as a 50% mixture with gas oils. Keywords: bar; bio; catalyst; como; feedstock; gas; lard; lhsv; oil; product
- Investigation of the Hydroconversion of Lard and Lard-Gas Oil Mixture on PtPd/USY Catalyst by Baladincz, P.; Tóth, Cs.; Kovács, S.; Hancsók, J. (2011) - On Fig. 13, it can be seen that in the case of 50% triglyceride containing feedstock, compared with what can be experienced in the case of pure gas oil feedstock, it is turned up, that the most favourable process temperature for achieve the maximum dearomatizing efficiency slightly higher, thanks to the high heteroatom content of the feedstock originated from its triglyceride part. We determined that during the co-processing of lard and desulphurized gas oil, the saturation of the aromatic content and the deoxygenation of the triglyceride part of the feedstock -isoparaffins formed - took place, respectively and at process temperatures (360–380 °C) found to be favourable by us, excellent, bio-component containing and significantly dearomatized diesel fuel blending components could be obtained. Keywords: bio; case; feedstock; fuels; gas; gas oil; lard; oil; product; triglyceride
- Vehicle Exhaust Gas Emission and its Catalytic Depollution by Sinka, Zs.; Kovács, J.; Yuzhakova, T.; Lakó, J. (2011) - Keywords: gas emissions, vehicle, catalytic converter, nitrogen oxides, hydrocarbons Introduction The sustainable development should be taken into consideration in everyday life activities, that is respected behind the process mechanization, automatization the environmental and atmosphere protection problems as well. Some experimental studies were carried out to investigate the activity of used commercial catalysts for cleaning processes of Otto engines exhaust gases. Keywords: air; catalyst; emission; exhaust; gas; methane; nitrogen; oxides
- Feasibility study of gas separation membranes for biohydrogen separation by Bakonyi, P.; Nemestóthy, N.; Ramirez, J.; Ruiz-Filippi, G.; Bélafi-Bakó, K. (2011) - In this work concentration of biohydrogen by gas separation membranes were aimed to study. There are different methods for hydrogen separation and concentration including the membrane processes such as membrane gas separation Keywords: gas; hydrogen; membranes; permeation; pressure; separation
- Investigation of catalytic conversion of Fischer-Tropsch wax on Pt/ALSBA-15 and Pt/beta zeolite catalysts by Pölczmann, Gy.; Valyon, J.; Hancsók, J. (2011) - 2. Table 1: The main characteristics of the feedstock Properties Value N-paraffin content (C18-C57), % 99.6 Sulphur content, mg/kg 2.5 Nitrogen content, mg/kg 12 Pour point, °C 72 Catalysts We used as catalyst AlSBA-15 and beta zeolite carrier materials prepared by us. The applicability and catalytic activity of Pt/AlSBA-15 and Pt/beta zeolite catalysts of 0.5% platinum content for the selective isomerization of Fischer-Tropsch wax was investigated in the present experiment. Keywords: alsba-15; bar; beta; catalyst; content; fischer; gas; products; tropsch
- Measurement-based Modelling and Simulation of a Hydrogengenerating Dry Cell for Complex Domestic Renewable Energy Systems by Göllei, Attila; Görbe, Péter; Magyar, Attila; Neukirchner, László (2014) - We tested it in a simulation of a complex domestic power plant using a renewable energy source and hydrogen generation cell. Two unknown functional relationships between the generated H2 volume, the cell current and the KOH concentration and between cell voltage, cell current and KOH concentration were approximated using fourth and third order polynomials, respectively Figure 2: The setup of a HHO gas generator cell block Table 1: Experimental results Electrolyte concentration, g dm-3 MMWa, cm3 min-1 W-1 Gas production, dm3 min-1 Power of unit, W 1 2.13 0.20 10.8 2 2.66 0.75 34.4 3 2.66 1.37 55.8 4 2.59 1.51 82.2 5 2.72 1.90 90.6 6 2.63 2.52 119.5 7 2.67 2.96 140.0 8 2.65 2.76 125.0 9 2.46 2.28 105.6 10 1.82 2.15 103.2 a millilitres per minute per watt 87 using the Matlab Surface Fitting Tool. Keywords: cell; energy; gas; hydrogen; model
- Selective Hydrogen Sulphide Removal from Acid Gas by Alkali Chemisorption in a Jet Reactor by Bobek, Janka; Rippel-Pethő, Dóra; Molnár, Éva; Bocsi, Róbert (2016) - Effect of H2S Concentration The influence of H2S concentration on the efficiency of H2S removal was investigated under a nearly constant CO2 level (76 and 72% (m3/m3)) and greatly differing H2S (85 and 520 ppmv) containing model gases. Effect of different H2S concentrations on the efficiency of H2S removal (gas mixtures 5-6, 30 bar, 0.09 s residence time, 1.5% (g/g) NaOH). Keywords: co2; efficiency; gas; h2s; removal
- Separation of Gases by Membranes: The Effects of Pollutants on the Stability of Membranes by Nemestóthy, Nándor (2017) - Similar levels of membrane degradation are observed in proton-exchange membrane (PEM) fuel cells and batteries containing membranes, where oxi- dising compounds are in contact with the membranes, as well [4-5]. The damaging effects of H2S, BTX and n-dodecane were investigated in terms of polyimide gas separation membranes using nitrogen gas. Keywords: btx; gas; h2s; membranes; permeability; pollutants
- GPU-Accelerated Simulation of a Rotary Valve by the Discrete Element Method by Füvesi, Balázs; Ulbert, Zsolt (2019) - The following chapters of this paper describe the dis- crete element method used in the modeling and simula- tion of particle flow, the triangular geometric representa- tion technique used in the analysis of particle-wall colli- sions, the main features of the GPU hardware and parallel programming used in calculations, and the simulation re- sults of the investigation of the effect of geometric and operational parameters of rotary valves on the mass out- flow rate of solid particles. Géotechnique 1979, 29(1), 47–65 DOI: 10.1680/geot.1979.29.1.47 [15] Hoomans, B.P.B., Kuipers, J.A.M., Briels, W.J., van Swaaij, W.P.M.: Discrete particle simulation of bubble and slug formation in a two-dimensional gas-fluidized bed: A hard sphere approach. Keywords: contact; gas; mass; outflow; particles; phase; rate; rotary; rotary valve; silo; simulation; speed; valve; vector
- FINE BUBBLE GENERATION IN A COLUMN REACTOR BY PLACEMENT OF A DIAPHRAGM ACROSS A LOW FREQUENCY SOUND FIELD by Swamy, K. M.; Keil, F. J. (2002) - Keywords: Bubble generation, diaphragm, column reactor, sound field Introduction Fast reactions in bubble columns are mass transfer controlled. In the present mvestlgation, through placement of a diaphragm across a sound field, bubble sizes were further reduced by about 8.3%. Keywords: bubble; column; diaphragm; gas; sound
- PRESSURE DROP IN ELECTROCHEMICAL CELL WITH FIXED BED by Serbula, S. M. ; Stanković, V. D.; Antonijević, M. M. (2002) - At electrolyte velocity of 0.00587 m/s, 84 10 12 14 16 18 20 't(min.) Fig.4 Dependence of relative pressure drop on time for various electrolyte velocities (diameter of glass particles d=2 mm and current density i=50 Alm2 ) pressure drop in the bed is the highest one. If Eqs.(8) and (4) are devided, we get the influence of gas phase on relative pressure drop: 150· c;w,,u,[I + 2,5(1 ~tp~)J + 1,75c;wifp8qJ, + (1-tp,)pJ !: Keywords: bed; drop; electrolyte; gas; particles; phase; pressure; pressure drop; velocity
- ON THE PURIFICATION OF GASES CONTAINING IMPURITIES OF SMALL CONCENTRATION by Boyadjiev, C. (2002) - L u Q s u v A.V 1] 8.cp 105 stoichiometric quantity of the liquid phase, (m3/s) real quantity of the liquid phase, (m 3 /s) relative increasing of the liquid flow rate, (m3 /s) gas flow rate, (m3 / s) specific mass transfer surface, (m2 mass transfer surface/ m3 active zone) gas velocity, (m/ s) active zone volume, (m3 ) increasing active zone volume, (m3 ) purification degree, (%) {S) The experimental data for the gas absorption in the packed column [4] show that the volumetric mass transfer coefficient in gas phase for Raschig rings (502t50x2)mm is k = l.4kg/m3 .bar.s. Keywords: gas; mass; zone
- Spline Functions in Evaluation of Explosion Limit Curves for Gas Mixtures by Molnárné-Jobbágy, M.; Kollár-Hunek, K. (2005) - Keywords: Ternary flammable systems, inerting, explosion areas, co-monotonic spline curves Introduction Inerting of explosive fuel-air mixtures is a frequently applied method in the chemical and related industries to prevent fires and explosions. The in-house version of CHEMSAFE® allows a graphical representation of the measured explosion range of ternary systems in triangular diagrams as a function of the concentration of flammable (combustible), oxidising or inert gases. Keywords: apex; explosion; gas; inert; lel; point; systems; uel
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- Application of Analog Computers for the Measurement and Evaluation of Residence Time Distribution by László, A.; Árva, P. 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- Algebraic Description of Technical Chemical Systems I. The Significance of Modern Algebraic Methods in Chemical Systems Engineering by Brickle, T. 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- Studies on the Hydrodynamics of Fluidized Layers I. Measuring Methods for the Determination of the Expansion of Fluidized Layers by Brickle, T.; Ormós, Z. 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- Hydroformylation of Propylene With Hydrogen, Rh4(CO)12 and Carbon Monoxide by Csontos, G.; Heil, B.; Markó, T.; Chini, P. 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- Calculation of Extraction Columns for Lubricating Oil Refining by Kántor, E.; Magyar, M.; Mózes, Gy. 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- Description of the Thermal Decomposition of Naphthas by Illés, V.; Welther, K.; Szepesy, L. 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- Catalytic Dehydrogenation of Tetrahydrothiophene to Thiophene by Gárdos, Gy.; Hodossy, L.; Kun Szabó, T. 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- Downloadable Full 1973 Issue by , (1973) - Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 84 Page 85 Page 86 Page 87 Page 88 Page 89 Page 90 Page 91 Page 92 Page 93 Page 94 Page 95 Page 96 Page 97 Page 98 Page 99 Page 100 Page 101 Page 102 Page 103 Page 104 Page 105 Page 106 Page 107 Page 108 Page 109 Page 110 Page 111 Page 112 Page 113 Page 114 Page 115 Page 116 Page 117 Page 118 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- Beitrag zur Anwendung der Dünnschichtapparate by Ujhidy, A.; Berkes, R. 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- Algebraic Description of Technical Chemical Systems II. Material Systems And Changes by Brickle, T.; Bátor, E.; Halász, Zs. 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- Studies on the Hydrodynamics of Fluidized Layers II. Streaming of Fluid, Particle Motion and Layer Expansion in Systems Fluidized With a Liquid by Brickle, T.; Ormós, Z. 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- Studies on Granulation in Fluidized Bed I. Methods for Testing the Physical Properties of Granulates by Ormós, Z. 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- Determination of Optimum Parameters in Connection with Transportation with a Gas Stream by Brickle, T.; Bátor, E. 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- Mathematical Model for Rectification Processes by Parti, M.; Paláncz, B. 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- Mathematical Modelling of Absorption Columns I. The Investigation of the Models of Absorption Columns by Árva, P.; Szeifert, F. 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- Downloadable Full 1973 Issue by , (1973) - Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 84 Page 85 Page 86 Page 87 Page 88 Page 89 Page 90 Page 91 Page 92 Page 93 Page 94 Page 95 Page 96 Page 97 Page 98 Page 99 Page 100 Page 101 Page 102 Page 103 Page 104 Page 105 Page 106 Page 107 Page 108 Page 109 Page 110 Page 111 Page 112 Page 113 Page 114 Page 115 Page 116 Page 117 Page 118 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- Energetic Interpretation of Distillation Based on Non-Equilibrium Thermodynamics by Fonyó, Z. 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- Studies On Granulation in a Fluidized Bed II. The Effects of the Amount of the Binder on the Physical Properties of Granules Formed in a Fluidized Bed by Ormós, Z.; Pataki, K.; Csukás, B. 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- Generalization of the Entropy of Mixing I. by Tőrös, R. 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- A Method for the Calculation of the Nonpolar Solubility Parameter of Unsaturated Normal Hydrocarbons by Deák, Gy. 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- Investigation of the Fluid Mechanics in Liquid-Spouted Bed Systems by Mészáros, E.; Brickle, T. 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- Determination of the Virtual Rate Constant of a Catalytic Isomerization Process by Pór, J. 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- Mathematical Modelling of Absorption Columns II. Parameter Sensitivity and Methods for its Calculation by Árva, P.; Szeifert, F. 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- A Digital Calorimeter and its Applications in Chemical Industry by Farkas, J.; Molnár, F. 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- Hydroformylation of Safrole: The Mechanism of Ring Closure and Formation of Tetralin Derivate by Palágyi, J.; Décsy, Z.; Pályi, Gy.; Markó, L. 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- Downloadable Full 1973 Issue by , (1973) - Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 84 Page 85 Page 86 Page 87 Page 88 Page 89 Page 90 Page 91 Page 92 Page 93 Page 94 Page 95 Page 96 Page 97 Page 98 Page 99 Page 100 Page 101 Page 102 Page 103 Page 104 Page 105 Page 106 Page 107 Page 108 Page 109 Page 110 Page 111 Page 112 Page 113 Page 114 Page 115 Page 116 Page 117 Page 118 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- Mathematical Modelling of Absorption Columns III. The Practical Use of the Parameter Sensitivity Concept by Árva, P.; Szeifert, F. 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- Oligomerization of Silicate Anions in Portland Cement Hydration by Tamás, F. 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- Studies on Homogeneous Olefin Disproportionation Catalysts by Bencze, L.; Rédey, Á.; Markó, L. 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- Studies on Granulation in a Fluidized Bed III. Calculation of the Feed Rate of Granulating Liquid by Ormós, Z.; Pataki, K.; Csukás, B. 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- Studies on Granulation in a Fluidized Bed IV. Effects of the Characteristic of the Fluidized Bed the Atomization and the Air Distributor Upon the Physical Properties of the Granulates by Ormós, Z.; Pataki, K.; Csukás, B. 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- Studies on the Hydrodynamics of Fluidized Layers III. Calculation of Layer Expansion in Systems Fluidized With a Liquid by Ormós, Z.; Blickle, T. 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- Verfahren zur Herstellung von Fettsäuerzuckerestern by Ujhidy, A.; Szépvölgyi, J.; Szabó, Z. 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- Algebraic Description of Technical Chemical Systems III. Transformations of Material Systems by Blickle, T.; Bencze, T. 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- Thermal Stability of Chemical Reactors by László, A.; Dencs, J. 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- Determination of the Ash and Moisture Content of Mineral Coals by Neutron Slow-Down by Faludi, G.; Házi, E.; Csapó, Z. 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- The Fuzzy Experimental Multiobjective Optimization of the Electrochemical Reduction Process of Maleic Acid to Succinic Acid by Smigielski, Krzysztof; Góra, Józef; Kula, Józef (1992) - Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 84 Page 85 Page 86 Page 87 Page 88 Page 89 Page 90 Page 91 Page 92 Page 93 Page 94 Page 95 Page 96 Page 97 Page 98 Page 99 Page 100 Page 101 Page 102 Page 103 Page 104 Page 105 Page 106 Page 107 Page 108 Page 109 Page 110 Page 111 Page 112 Page 113 Page 114 Page 115 Page 116 Page 117 Page 118 Page 119 Page 120 Page 121 Page 122 Page 123 Page 124 Page 125 Page 126 Page 127 Page 128 Page 129 Page 130 Page 131 Page 132 Page 133 Page 134 Page 135 Page 136 Page 137 Page 138 Page 139 Page 140 Page 141 Page 142 Page 143 Page 144 Page 145 Page 146 Page 147 Page 148 Page 149 Page 150 Page 151 Page 152 Page 153 Page 154 Page 155 Page 156 Page 157 Page 158 Page 159 Page 160 Page 161 Page 162 Page 163 Page 164 Page 165 Page 166 Page 167 Page 168 Page 169 Page 170 Page 171 Page 172 Page 173 Page 174 Page 175 Page 176 Page 177 Page 178 Page 179 Page 180 Page 181 Page 182 Page 183 Page 184 Page 185 Page 186 Page 187 Page 188 Page 189 Page 190 Page 191 Page 192 Page 193 Page 194 Page 195 Page 196 Page 197 Page 198 Page 199 Page 200 Page 201 Page 202 Page 203 Page 204 Page 205 Page 206 Page 207 Page 208 Page 209 Page 210 Page 211 Page 212 Page 213 Page 214 Page 215 Page 216 Page 217 Page 218 Page 219 Page 220 Page 221 Page 222 Page 223 Page 224 Page 225 Page 226 Page 227 Page 228 Page 229 Page 230 Page 231 Page 232 Page 233 Page 234 Page 235 Page 236 Page 237 Page 238 Page 239 Page 240 Page 241 Page 242 Page 243 Page 244 Page 245 Page 246 Page 247 Page 248 Page 249 Page 250 Page 251 Page 252 Page 253 Page 254 Page 255 Page 256 Page 257 Page 258 Page 259 Page 260 Page 261 Page 262 Page 263 Page 264 Page 265 Page 266 Page 267 Page 268 Page 269 Page 270 Page 271 Page 272 Page 273 Page 274 Page 275 Page 276 Page 277 Page 278 Page 279 Page 280 Page 281 Page 282 Page 283 Page 284 Page 285 Page 286 Page 287 Page 288 Page 289 Page 290 Page 291 Page 292 Page 293 Page 294 Page 295 Page 296 Page 297 Page 298 Page 299 Page 300 Page 301 Page 302 Page 303 Page 304 Page 305 Page 306 Page 307 Page 308 Page 309 Page 310 Page 311 Page 312 Page 313 Page 314 Page 315 Page 316 Page 317 Page 318 Page 319 Page 320 Page 321 Page 322 Page 323 Page 324 Keywords: page
- Solubility of Gases in Normal-alkanes by Makranczy, J.; Mrs. Megyery-Balog, K.; Rusz, L.; Patyi, L. (1976) - Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 84 Page 85 Page 86 Page 87 Page 88 Page 89 Page 90 Page 91 Page 92 Page 93 Page 94 Page 95 Page 96 Page 97 Page 98 Page 99 Page 100 Page 101 Page 102 Page 103 Page 104 Page 105 Page 106 Page 107 Page 108 Page 109 Page 110 Page 111 Page 112 Page 113 Page 114 Page 115 Page 116 Page 117 Page 118 Page 119 Page 120 Page 121 Page 122 Page 123 Page 124 Page 125 Page 126 Page 127 Page 128 Page 129 Page 130 Page 131 Page 132 Page 133 Page 134 Page 135 Page 136 Page 137 Page 138 Page 139 Page 140 Page 141 Page 142 Page 143 Page 144 Page 145 Page 146 Page 147 Page 148 Page 149 Page 150 Page 151 Page 152 Page 153 Page 154 Page 155 Page 156 Page 157 Page 158 Page 159 Page 160 Page 161 Page 162 Page 163 Page 164 Page 165 Page 166 Page 167 Page 168 Page 169 Page 170 Page 171 Page 172 Page 173 Page 174 Page 175 Page 176 Page 177 Page 178 Page 179 Page 180 Page 181 Page 182 Page 183 Page 184 Page 185 Page 186 Page 187 Page 188 Page 189 Page 190 Page 191 Page 192 Page 193 Page 194 Page 195 Page 196 Page 197 Page 198 Page 199 Page 200 Page 201 Page 202 Page 203 Page 204 Page 205 Page 206 Page 207 Page 208 Page 209 Page 210 Page 211 Page 212 Page 213 Page 214 Page 215 Page 216 Page 217 Page 218 Page 219 Page 220 Page 221 Page 222 Page 223 Page 224 Page 225 Page 226 Page 227 Page 228 Page 229 Page 230 Page 231 Page 232 Page 233 Page 234 Page 235 Page 236 Page 237 Page 238 Page 239 Page 240 Page 241 Page 242 Page 243 Page 244 Page 245 Page 246 Page 247 Page 248 Page 249 Page 250 Page 251 Page 252 Page 253 Page 254 Page 255 Page 256 Page 257 Page 258 Page 259 Page 260 Page 261 Page 262 Page 263 Page 264 Page 265 Page 266 Page 267 Page 268 Page 269 Page 270 Page 271 Page 272 Page 273 Page 274 Page 275 Page 276 Page 277 Page 278 Page 279 Page 280 Page 281 Page 282 Page 283 Page 284 Page 285 Page 286 Page 287 Page 288 Page 289 Page 290 Page 291 Page 292 Page 293 Page 294 Page 295 Page 296 Page 297 Page 298 Page 299 Page 300 Page 301 Page 302 Page 303 Page 304 Page 305 Page 306 Page 307 Page 308 Page 309 Page 310 Page 311 Page 312 Page 313 Page 314 Page 315 Page 316 Page 317 Page 318 Page 319 Page 320 Page 321 Page 322 Page 323 Page 324 Page 325 Keywords: page
- Computer Evaluation of Distillation Processes with Parallel Streams by Mizsey, P.; Mészáros, I.; Fonyó, Z. (1992) - Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 84 Page 85 Page 86 Page 87 Page 88 Page 89 Page 90 Page 91 Page 92 Page 93 Page 94 Page 95 Page 96 Page 97 Page 98 Page 99 Page 100 Page 101 Page 102 Page 103 Page 104 Page 105 Page 106 Page 107 Page 108 Page 109 Page 110 Page 111 Page 112 Page 113 Page 114 Page 115 Page 116 Page 117 Page 118 Page 119 Page 120 Page 121 Page 122 Page 123 Page 124 Page 125 Page 126 Page 127 Page 128 Page 129 Page 130 Page 131 Page 132 Page 133 Page 134 Page 135 Page 136 Page 137 Page 138 Page 139 Page 140 Page 141 Page 142 Page 143 Page 144 Page 145 Page 146 Page 147 Page 148 Page 149 Page 150 Page 151 Page 152 Page 153 Page 154 Page 155 Page 156 Page 157 Page 158 Page 159 Page 160 Page 161 Page 162 Page 163 Page 164 Page 165 Page 166 Page 167 Page 168 Page 169 Page 170 Page 171 Page 172 Page 173 Page 174 Page 175 Page 176 Page 177 Page 178 Page 179 Page 180 Page 181 Page 182 Page 183 Page 184 Page 185 Page 186 Page 187 Page 188 Page 189 Page 190 Page 191 Page 192 Page 193 Page 194 Page 195 Page 196 Page 197 Page 198 Page 199 Page 200 Page 201 Page 202 Page 203 Page 204 Page 205 Page 206 Page 207 Page 208 Page 209 Page 210 Page 211 Page 212 Page 213 Page 214 Page 215 Page 216 Page 217 Page 218 Page 219 Page 220 Page 221 Page 222 Page 223 Page 224 Page 225 Page 226 Page 227 Page 228 Page 229 Page 230 Page 231 Page 232 Page 233 Page 234 Page 235 Page 236 Page 237 Page 238 Page 239 Page 240 Page 241 Page 242 Page 243 Page 244 Page 245 Page 246 Page 247 Page 248 Page 249 Page 250 Page 251 Page 252 Page 253 Page 254 Page 255 Page 256 Page 257 Page 258 Page 259 Page 260 Page 261 Page 262 Page 263 Page 264 Page 265 Page 266 Page 267 Page 268 Page 269 Page 270 Page 271 Page 272 Page 273 Page 274 Page 275 Page 276 Page 277 Page 278 Page 279 Page 280 Page 281 Page 282 Page 283 Page 284 Page 285 Page 286 Page 287 Page 288 Page 289 Page 290 Page 291 Page 292 Page 293 Page 294 Page 295 Page 296 Page 297 Page 298 Page 299 Page 300 Page 301 Page 302 Page 303 Page 304 Page 305 Page 306 Page 307 Page 308 Page 309 Page 310 Page 311 Page 312 Page 313 Page 314 Page 315 Page 316 Page 317 Page 318 Page 319 Page 320 Page 321 Page 322 Page 323 Page 324 Page 325 Page 326 Page 327 Page 328 Page 329 Page 330 Page 331 Page 332 Page 333 Page 334 Keywords: page
- The Solubility of Micronutrients in Ammonium Polyphosphate Solutions by Gór-Nagy, S.; Káldi, P.; Mrs. Bésán, J.; Szántó, A. (1978) - Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 84 Page 85 Page 86 Page 87 Page 88 Page 89 Page 90 Page 91 Page 92 Page 93 Page 94 Page 95 Page 96 Page 97 Page 98 Page 99 Page 100 Page 101 Page 102 Page 103 Page 104 Page 105 Page 106 Page 107 Page 108 Page 109 Page 110 Page 111 Page 112 Page 113 Page 114 Page 115 Page 116 Page 117 Page 118 Page 119 Page 120 Page 121 Page 122 Page 123 Page 124 Page 125 Page 126 Page 127 Page 128 Page 129 Page 130 Page 131 Page 132 Page 133 Page 134 Page 135 Page 136 Page 137 Page 138 Page 139 Page 140 Page 141 Page 142 Page 143 Page 144 Page 145 Page 146 Page 147 Page 148 Page 149 Page 150 Page 151 Page 152 Page 153 Page 154 Page 155 Page 156 Page 157 Page 158 Page 159 Page 160 Page 161 Page 162 Page 163 Page 164 Page 165 Page 166 Page 167 Page 168 Page 169 Page 170 Page 171 Page 172 Page 173 Page 174 Page 175 Page 176 Page 177 Page 178 Page 179 Page 180 Page 181 Page 182 Page 183 Page 184 Page 185 Page 186 Page 187 Page 188 Page 189 Page 190 Page 191 Page 192 Page 193 Page 194 Page 195 Page 196 Page 197 Page 198 Page 199 Page 200 Page 201 Page 202 Page 203 Page 204 Page 205 Page 206 Page 207 Page 208 Page 209 Page 210 Page 211 Page 212 Page 213 Page 214 Page 215 Page 216 Page 217 Page 218 Page 219 Page 220 Page 221 Page 222 Page 223 Page 224 Page 225 Page 226 Page 227 Page 228 Page 229 Page 230 Page 231 Page 232 Page 233 Page 234 Page 235 Page 236 Page 237 Page 238 Page 239 Page 240 Page 241 Page 242 Page 243 Page 244 Page 245 Page 246 Page 247 Page 248 Page 249 Page 250 Page 251 Page 252 Page 253 Page 254 Page 255 Page 256 Page 257 Page 258 Page 259 Page 260 Page 261 Page 262 Page 263 Page 264 Page 265 Page 266 Page 267 Page 268 Page 269 Page 270 Page 271 Page 272 Page 273 Page 274 Page 275 Page 276 Page 277 Page 278 Page 279 Page 280 Page 281 Page 282 Page 283 Page 284 Page 285 Page 286 Page 287 Page 288 Page 289 Page 290 Page 291 Page 292 Page 293 Page 294 Page 295 Page 296 Page 297 Page 298 Page 299 Page 300 Page 301 Page 302 Page 303 Page 304 Page 305 Page 306 Page 307 Page 308 Page 309 Page 310 Page 311 Page 312 Page 313 Page 314 Page 315 Page 316 Page 317 Page 318 Page 319 Page 320 Page 321 Page 322 Page 323 Page 324 Page 325 Page 326 Page 327 Page 328 Page 329 Page 330 Page 331 Page 332 Page 333 Page 334 Page 335 Page 336 Page 337 Page 338 Page 339 Page 340 Page 341 Page 342 Page 343 Page 344 Page 345 Page 346 Page 347 Page 348 Page 349 Page 350 Page 351 Page 352 Page 353 Page 354 Page 355 Page 356 Page 357 Page 358 Page 359 Page 360 Page 361 Page 362 Page 363 Page 364 Page 365 Page 366 Page 367 Page 368 Page 369 Page 370 Page 371 Page 372 Page 373 Page 374 Page 375 Page 376 Page 377 Page 378 Page 379 Page 380 Page 381 Page 382 Page 383 Page 384 Page 385 Page 386 Page 387 Page 388 Page 389 Page 390 Page 391 Page 392 Page 393 Page 394 Page 395 Page 396 Page 397 Page 398 Page 399 Page 400 Page 401 Page 402 Page 403 Page 404 Page 405 Page 406 Page 407 Page 408 Page 409 Page 410 Page 411 Page 412 Page 413 Page 414 Keywords: page
- Acetylsalicylic Acid Crystallization: Hydrodynamics of the Fluidized Bed by Daescu, C. (1999) - Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 84 Page 85 Page 86 Page 87 Page 88 Page 89 Page 90 Page 91 Page 92 Page 93 Page 94 Page 95 Page 96 Page 97 Page 98 Page 99 Page 100 Page 101 Page 102 Page 103 Page 104 Page 105 Page 106 Page 107 Page 108 Page 109 Page 110 Page 111 Page 112 Page 113 Page 114 Page 115 Page 116 Page 117 Page 118 Page 119 Page 120 Page 121 Page 122 Page 123 Page 124 Page 125 Page 126 Page 127 Page 128 Page 129 Page 130 Page 131 Page 132 Page 133 Page 134 Page 135 Page 136 Page 137 Page 138 Page 139 Page 140 Page 141 Page 142 Page 143 Page 144 Page 145 Page 146 Page 147 Page 148 Page 149 Page 150 Page 151 Page 152 Page 153 Page 154 Page 155 Page 156 Page 157 Page 158 Page 159 Page 160 Page 161 Page 162 Page 163 Page 164 Page 165 Page 166 Page 167 Page 168 Page 169 Page 170 Page 171 Page 172 Page 173 Page 174 Page 175 Page 176 Page 177 Page 178 Page 179 Page 180 Page 181 Page 182 Page 183 Page 184 Page 185 Page 186 Page 187 Page 188 Page 189 Page 190 Page 191 Page 192 Page 193 Page 194 Page 195 Page 196 Page 197 Page 198 Page 199 Page 200 Page 201 Page 202 Page 203 Page 204 Page 205 Page 206 Page 207 Page 208 Page 209 Page 210 Page 211 Page 212 Page 213 Page 214 Page 215 Page 216 Page 217 Page 218 Page 219 Page 220 Page 221 Page 222 Page 223 Page 224 Page 225 Page 226 Page 227 Page 228 Page 229 Page 230 Page 231 Page 232 Page 233 Page 234 Page 235 Page 236 Page 237 Page 238 Page 239 Page 240 Page 241 Page 242 Page 243 Page 244 Page 245 Page 246 Page 247 Page 248 Page 249 Page 250 Page 251 Page 252 Page 253 Page 254 Page 255 Page 256 Page 257 Page 258 Page 259 Page 260 Page 261 Page 262 Page 263 Page 264 Page 265 Page 266 Page 267 Page 268 Page 269 Page 270 Page 271 Page 272 Page 273 Page 274 Page 275 Page 276 Page 277 Page 278 Page 279 Page 280 Page 281 Page 282 Page 283 Page 284 Page 285 Page 286 Page 287 Page 288 Page 289 Page 290 Page 291 Page 292 Page 293 Page 294 Page 295 Page 296 Page 297 Page 298 Page 299 Page 300 Page 301 Page 302 Page 303 Page 304 Page 305 Page 306 Page 307 Page 308 Page 309 Page 310 Page 311 Page 312 Page 313 Page 314 Page 315 Page 316 Page 317 Page 318 Page 319 Page 320 Page 321 Page 322 Page 323 Page 324 Page 325 Page 326 Page 327 Page 328 Page 329 Page 330 Page 331 Page 332 Page 333 Page 334 Page 335 Page 336 Page 337 Page 338 Page 339 Page 340 Page 341 Page 342 Page 343 Page 344 Page 345 Page 346 Keywords: page
- Characterization of Crystal Populations of Vitamin C by Hyperbolic Tangent Distribution Functions by Bodor, Beáta; Lakatos, Béla G.; Blickle, Tibor (1993) - Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 84 Page 85 Page 86 Page 87 Page 88 Page 89 Page 90 Page 91 Page 92 Page 93 Page 94 Page 95 Page 96 Page 97 Page 98 Page 99 Page 100 Page 101 Page 102 Page 103 Page 104 Page 105 Page 106 Page 107 Page 108 Page 109 Page 110 Page 111 Page 112 Page 113 Page 114 Page 115 Page 116 Page 117 Page 118 Page 119 Page 120 Page 121 Page 122 Page 123 Page 124 Page 125 Page 126 Page 127 Page 128 Page 129 Page 130 Page 131 Page 132 Page 133 Page 134 Page 135 Page 136 Page 137 Page 138 Page 139 Page 140 Page 141 Page 142 Page 143 Page 144 Page 145 Page 146 Page 147 Page 148 Page 149 Page 150 Page 151 Page 152 Page 153 Page 154 Page 155 Page 156 Page 157 Page 158 Page 159 Page 160 Page 161 Page 162 Page 163 Page 164 Page 165 Page 166 Page 167 Page 168 Page 169 Page 170 Page 171 Page 172 Page 173 Page 174 Page 175 Page 176 Page 177 Page 178 Page 179 Page 180 Page 181 Page 182 Page 183 Page 184 Page 185 Page 186 Page 187 Page 188 Page 189 Page 190 Page 191 Page 192 Page 193 Page 194 Page 195 Page 196 Page 197 Page 198 Page 199 Page 200 Page 201 Page 202 Page 203 Page 204 Page 205 Page 206 Page 207 Page 208 Page 209 Page 210 Page 211 Page 212 Page 213 Page 214 Page 215 Page 216 Page 217 Page 218 Page 219 Page 220 Page 221 Page 222 Page 223 Page 224 Page 225 Page 226 Page 227 Page 228 Page 229 Page 230 Page 231 Page 232 Page 233 Page 234 Page 235 Page 236 Page 237 Page 238 Page 239 Page 240 Page 241 Page 242 Page 243 Page 244 Page 245 Page 246 Page 247 Page 248 Page 249 Page 250 Page 251 Page 252 Page 253 Page 254 Page 255 Page 256 Page 257 Page 258 Page 259 Page 260 Page 261 Page 262 Page 263 Page 264 Page 265 Page 266 Page 267 Page 268 Page 269 Page 270 Page 271 Page 272 Page 273 Page 274 Page 275 Page 276 Page 277 Page 278 Page 279 Page 280 Page 281 Page 282 Page 283 Page 284 Page 285 Page 286 Page 287 Page 288 Page 289 Page 290 Page 291 Page 292 Page 293 Page 294 Page 295 Page 296 Page 297 Page 298 Page 299 Page 300 Page 301 Page 302 Page 303 Page 304 Page 305 Page 306 Page 307 Page 308 Page 309 Page 310 Page 311 Page 312 Page 313 Page 314 Page 315 Page 316 Page 317 Page 318 Page 319 Page 320 Page 321 Page 322 Page 323 Page 324 Page 325 Page 326 Page 327 Page 328 Page 329 Page 330 Page 331 Page 332 Page 333 Page 334 Keywords: page
Production
- APPLICATION OF LIFE-CYCLE ASSESSMENT FOR A PHARMACEUTICAL PRODUCT by Herner, K.; Rédei, J.; Tamaska, L.; Vizi, Sz.; Rédey, Á. (2001) - which environmental effects are bigger (normah7.ationJ. the relative importance of the effects tvalUJ!f\lnl. Environmental effects caused by the dragee covering are the acidification and dust from the transportation and have 0.267 ecopoints. Keywords: cycle; dragee; effects; environmental; life; packaging; production; substance
- Optimization of Erythritol Fermentation by High-Throughput Screening Assays by Eszterbauer, Edina ; Németh, Áron (2022) - 2. Experimental The planned experiment in terms of erythritol production was performed by three Yarrowia lipolytica strains from the National Collection of Agricultural and Industrial Microorganisms (NCAIM, Hungary), namely NCAIM Yarrowia lipolytica 00597, NCAIM Yarrowia lipolytica 00594 and NCAIM Yarrowia divulgata 1485. Due to the high osmotic pressure and low pH during erythritol production, cells grow slowly, so a thorough study of many parallel fermentations needs to be performed. Keywords: erythritol; fermentation; glucose; glycerol; lipolytica; production; yarrowia
- Utilization of Agro-Wastes in Biohydrogen Fermentation by Various Microorganisms by Bélafi-Bakó, Katalin; Tóth, Gábor; Bakonyi, Péter; Nemestóthy, Nándor (2022) - Biohydrogen production by dark fermentation The composition and certain characteristics of agro- wastes are determining factors of biohydrogen production. 4. Conclusions In biohydrogen production, the application of agro- industrial residues has a great potential since they are renewable, huge amounts of them are formed year by year and have not been utilized. Keywords: agro; biohydrogen; doi; energy; fermentation; production; wastes; yield
- Production of Short Chain Fructooligosaccharides by Csanádi, Zs.; Sisak, Cs. (2008) - When glucose oxidase activity was measured we used the o-toluidine method Figure 3: The scheme of the integrated reactor system for the production of fructooligosaccharides Table 2: Glucose concentrations after several cycles in the integrated reactor system I. II. Keywords: activity; enzyme; fructooligosaccharides; glucose; product; production; reactor
- Microalgae Production in Service of Fuel Production by Bocsi, R.; Horváth, G.; Hanák, L. (2010) - Algae oil production for fuel technology first mentioned in the 1980’s and lives its renessaince 21st century Algae production is the most promising solution amongst the alternatives because of its specific area necessity and high reproduction rate. Keywords: algae; biomass; case; co2; composition; compounds; energy; extraction; microalgae; oil; organisms; parameters; production; species; use
- Designing of Smoother Hob by Bodzás, S.; Dudás, I. (2010) - Its reason is the mn normal module is normed for cylindrical gear hobs, while the max axial module is normed for worm gear hobs. Keywords: module, hob, production geometry Introduction If we give expanded one direction, turning motion for the indented bar shape tool without alternation, plane or chisel motion such we imagine the suitable lengthly indented bar of spreading out of the diameter along wide sloping thread line to spring to a cylinder surface (in production) and the threads defined, equal distance breaking, we create hob edges then the hob creates. Keywords: angle; cog; hob; hobs; production; worm
- Photofermentative Production of Hydrogen by Thiocapsa Roseopersicina from Simple Organic Substrates by Molnos, É.; Nyilasi, A.; Rákhely, G.; Muntean, O.; Kovács, K. L. (2010) - In the present study, H2 production by the Hox1 soluble hydrogenase and the nitrogenase were investigated. The nitrogenase based H2 production in purple non-sulphur bacteria is the major field of research Keywords: culture; growth; hox1; hydrogenase; nitrogenase; production; pyruvate
- Analysis of Global and Local Environmental Impacts of Bus Transport by LCA Methodologies by Simon, B.; Tamaska, L.; Kováts, N. (2010) - Primary aim of this present study is to estimate environmental impacts of air emissions caused by bus transport and to serve as an important basis for a decision-making process being necessary for achieving changes. Several studies have been already published for estimating emissions and environmental impact, which results have been incorporated in this present study Keywords: biodiesel; buses; emissions; euro; fuel; hydrogen; impact; production; transport; types
- Application of Improved Bio-Paraffins in Diesel Fuels by Kasza, T.; Tóth, Cs.; Hancsók, J. (2012) - 25–31 (2012) APPLICATION OF IMPROVED BIO-PARAFFINS IN DIESEL FUELS T. KASZA1, CS. TÓTH2, J. HANCSÓK2 1MOL Hungarian Oil and Gas Plc., Százhalombatta, HUNGARY 2University of Pannonia, MOL Department of Hydrocarbon and Coal Processing, 10 Egyetem Str., Veszprém, HUNGARY E-mail: hancsokj@almos.uni-pannon.hu Bio-paraffin containing mixtures produced from different natural triglycerides (conventional and improved vegetable oils, used cooking oils and fats, etc.) have high cetane number (95-105 units), but their freezing points are high (between +15 and +32°C). Investigation of the production of high cetane number bio gas oil from pre-hydrogenated vegetable oils over Pt/HZSM- 22/Al2O3, Microporous and Mesoporous Materials, 101 (2007) pp. Keywords: cetane; content; diesel; number; oil; paraffins; production; products
- Densification Processes of Microalgae Bred for Biodiesel Production by Hodai, Z.; Horváth, G.; Hanák, L.; Bocsi, R. (2011) - Interpretation of fouling characteristics of ultrafiltration membranes during the filtration of membrane bioreactor mixed liquor, Journal of Membrane Science, 264(1-2), (2005), 151–160 << /ASCII85EncodePages false /AllowTransparency false /AutoPositionEPSFiles true /AutoRotatePages /None /Binding /Left /CalGrayProfile According to the assessment of the experimental results, the optimal solution seems to be membrane separation, on different grounds. Keywords: alga; concentrate; content; densification; device; dm3; energy; membrane; module; permeate; production; suspension
- Investigation of Fuel Components Produced by the Isomerization of Bio-Paraffin Mixtures by Kasza, T.; Hancsók, J. (2011) - Investigation of the production of high cetane number biogasoil from pre-hydro- genated vegetable oils over Pt/HZSM-22/Al2O3, Microporous and Mesoporous Materials 101, (2007), 148–152 126 13. Methane and ethane were not found in gas products. Keywords: catalyst; content; feedstock; fuel; isomerization; lhsv; number; paraffins; production; products
- Bioethanol Production from Paper Sludge Pretreated by Subcritical Water by Pézsa, N.; Ailer, P. (2011) - The aim of this paper is to show an alternative for bioethanol production from paper sludge. Keywords: bioethanol, paper sludge, pretreatment, optimum consitions Introduction Alternative transport fuels have raised attention all over the world. Keywords: ethanol; experiments; fermentation; glucose; paper; production; sludge; substrate
- Investigations of Bio-gasoil Production by Solymosi, Péter; Varga, Zoltán; Hancsók, Jenő (2021) - [17] KASZA T., KALLÓ D., HANCSÓK J.: Quality improvement of bio-paraffin mixtures, Fuel, 2014, 120, 1-7 Techn., 2011, 92(5), 886-892 [8] SOLYMOSI P., BALADINCZ P., HANCSÓK J.: Production of motor fuels by the hydrogenation of rapeseed oil with high euric acid content, Proc. 19th EU Biomass Conference and Exhibition, Berlin, Germany, 2011, 2077-2081 Keywords: bio; fuels; gasoil; hancsók; oil; paraffin; production; properties
- Application of Fourier Transformation for Waste Minimization in Batch Plants. 2. Process-Units Assignment by Vaklieva-Bancheva, N. G.; Shopova, E. G.; Ivanov, B. B. (2003) - I – number of products; ID – units/tasks identification matrix L – number of production tasks; %MC – casein content in the skim-milk; MI – amount of material input to the task [kg]; %ML –lactose content in the skim-milk; MO – amount of material output from the task [kg]; %MP –protein content in the skim-milk; N – number of key components in used materials NB – number of batches; P – number of plant units Q – production demand [kg]; Q-I, Q-II – names of production demands used in the example; R – waste processed in the task [kg]; RC – recovery factor for casein; RF – recovery factor for milkfat; RS – solids recovery factor; %SC – solids content in curds; T – processing time [h]; TC – cycle time [h]; Ts – starting time of task with regard to the cycle beginning; V – apparatus volume [m3]; WL% – inherent loss of whey; X – vector of the key components; m – mass of waste processed from the production task per 1 kilogram target product The mass wl))n,i(X(m of the pollutant - w , for products i , can be determined from the pollutants mass balance of the production recipes as it is proposed in [5, 6]: ,)i(C.)i(MO))n,i(X(R)i(C.)i(MI ))n,i(X(Y 1))n,i(X(m lj l'j wjjwlwjjwl −+= ∑ ∑ ∈ ∈ Ii,i,Ll,l,Ww,w,Nn,n ii ∈∀∈∀∈∀∈∀ (12) where: )i(MI and )i(MO note the amount of materials input into processing task l of product i by the flows j and output by the flows; )i(C is the composition of pollutant )i(C w is the relevant flow; ))n,i(X(R is the waste produced in the task l . Keywords: batch; production; products; task
- The Energy Balance of Separation Opportunities in Microalgae Technologies by Hodai, Zoltán; Rippel-Pethő, Dóra; Horváth, Géza; Hanák, László; Bocsi, Róbert (2021) - The utilisation of carbon dioxide by algae technologies depends on the technical environment and logistics of teamwork. Algae technology utilises waste gases and some environmentally harmful components from wastewaters as nutrients, and thus purifies the growth media. Keywords: algae; biomass; carbon; dioxide; energy; microalgae; production; research; separation; technology
Energy
- New Chaining Criteria in Dipolar Fluids Based on Monte Carlo Simulations by Nagy, Sándor (2020) - Keywords: dipolar fluids, chain formation, energy criterion 1. 1 shows the simulation results for the chain length distribution obtained for six different combinations of dipole moments, densities and energy criteria. Keywords: chain; criterion; densities; energy
- Comparative Study on Anaerobic Degradation Processes of Pressed Liquid Fraction of Organic Solid Waste by Rózsenberszki, Tamás; Koók, László; Bakonyi, Péter; Nemestóthy, Nándor; Bélafi-Bakó, Katalin (2021) - Furthermore, it is obvious that waste treatment is one of the most critical global issue, because it has significant impacts for the health, local and global environment and economy Prod., 2018, 196, 547–63 DOI: 10.1016/j.jclepro.2018.05.265 [4] Logan, M.; Visvanathan, C.: Management strate- gies for anaerobic digestate of organic fraction of municipal solid waste: Current status and future prospects. Keywords: anaerobic; doi; energy; environmental; mbt; processes; recovery; treatment; waste
- Efficiency Improvements of Solar Collectors by Turbulence Promoters by Lahcene, Abdelkader; Benamara, Nabil; Benguediab, Mohamed; Benazza, Abdelilah (2024) - Energy Technol. Assess., 2022, 52, 102047, DOI: 10.1016/j.seta.2022.102047 [21] Daliran, A.; Ajabshirchi, Y.: Theoretical and experimental research on effect of fins attachment on operating parameters and thermal efficiency of solar air collector, Inf. Due to their sustainability and availability, solar thermal collectors are frequently employed to heat homes. Keywords: air; energy; figure; flow; heat; number; performance; reynolds; transfer; triangular
- Life Cycle Assessment of Technological Shifts in Municipal Wastewater Treatment Plants by Harasztiné Hargitai, Réka; Sebestyén, Viktor; Volf, Balázs; Somogyi, Viola (2025) - The utilization of agro-wastes in biohydrogen fermentation not only enhances waste management efficiency but also contributes to the integration of renewable energy sources in wastewater treatment plants, supporting the achievement of energy neutrality [21] was employed as it offers a comprehensive database on wastewater treatment plants and the materials used. Keywords: biogas; chemical; consumption; doi; effluent; energy; flaring; impacts; kwh; plant; removal; scenario; sludge; treatment; values; wastewater; wastewater treatment
- Enhancing of Biodegradability of Sewage Sludge by Microwave Irradiation by Beszédes, S.; László, Zs.; Szabó, G.; Hodúr, C. (2008) - Conclusion The application of microwave irradiation has advantages in sludge treatment processes. After a 40 minutes heat-treatment at 95 °C a 25% enhancing of biogas product was experienced by both sludge, but these enhancing was significantly smaller than after a 20 minutes microwave irradiation, although the average temperature of microwave iradiated sludge was just about 83 °C. 0 100 200 300 1 4 7 10 13 16 19 22 25 28 Digestion time Keywords: energy; irradiation; level; microwave; min; power; pre; sewage; sludge; treatment
- Power Conditioning with Electric Car Battery Charging from Renewable Sources by Görbe, P.; Magyar, A.; Hangos, K. M. (2010) - Upper harmonic components have many undesirable effects on power grid • Maximum power controller Keywords: battery; controller; current; distortion; energy; grid; harmonic; inverter; mode; power; voltage
- Developement of New Technical Solution for Starter Motors for Passenger Cars by Nagy, L.; Jakab, E. (2010) - Sub-functions SFB21 and SFB22 were removed in working with the solution principles, however, they are necessary in the analysis, therefore the number of possible theoretical solutions is 130 2242842TSM =⋅⋅= , which can be divided into three different groups: ● Device controlled from a hydraulic supply unit (A2 branch): 961242T 2SMA =⋅⋅= theoretical solutions. The number of possible theoretical solutions is given according to the following relation: 2621444SSSSSSSSST 9 12FE11FEFDFC22FB21FB12FB11FBFAS Keywords: combustion; connection; design; device; energy; fig; functions; number; requirements; solutions; starting; sub; task
- Optimalisation the Position of Solar Cells for Vehicles by Lőrincz, I.; Czeglédi, D. (2011) - Figure 9: The changing of the difference between the charging and drag performance We have developed our vehicle further by utilizing our experience and measuring results (6, 7) of the vehicles built in the previous years (Fig. 10). OPTIMALISATION THE POSITION OF SOLAR CELLS FOR VEHICLES I. LŐRINCZ, D. CZEGLÉDI Széchenyi István University, Department of Automotive and Railway Engineering, Egyetem tér 1. Keywords: angle; cells; charging; drag; energy; model; performance; shape
- Cloud-Based Application for Smart Grid Simulation by Tar, Szabolcs; Fodor, Attila (2016) - This project offers solutions to these challenges: modelling of distribution networks, forecasts of renewable energy sources distributed generation (RES-DG), micro-grid management and responses to demand in new, complex solutions. Keywords: renewable energy, smart grid, demand response, cyber-security, network assets 1. Keywords: consumption; energy; grid; information; power; service
- The Initial Magnetic Susceptibility of Dense Aggregated Dipolar Fluids by Nagy, Sándor (2018) - The applied external mag- netic field is denoted by H0 and the sum of the external and generated magnetic fields by He. Here it is quite conceivable that the simple series ex- pansion of initial magnetic susceptibility as the summa- tion of positive integer powers of Langevin susceptibil- ity is unsatisfactory. Keywords: chain; dipole; energy; field; magnetization; particles; susceptibility; table
Control
- Robust Model Predictive Control with State Estimation for an Industrial Pressurizer System by Tamás, P.; Varga, I.; Szederkényi, G.; Bokor, J. (2005) - Keywords: process control, robust model predictive control, constrained control Introduction Recently, there has been a growing need for automation of increasingly complex plants in different branches of industry. Approximationof the minimal robustly positively invariant set for discrete-time LTI systems with persistent state disturbances. Keywords: control; k k; model; state
- Behavior of Control and Inhibitive Polyaspartic Coatings Using Alkylammonium and Zinc Phosphate Corrosion Inhibitors in Soil by Elhoud, Abdu; Van Everbroeck, Tim (2022) - Many attempts have been made in this regard to reduce the risk of soil corrosion on submerged steel and concrete structures. Keywords: soil, polyaspartic coating, corrosion inhibitor, iron oxide barrier 1. Keywords: coating; control; corrosion; inhibitor; iron; oxide; polyaspartic; soil; steel
- Assessment of UFMSW as a Soil Amendment: Effects on Plant Development by Molnár, Eliza; Rauch, Renáta; Bobek-Nagy, Janka; Kurdi, Róbert (2025) - Uses and benefits of MSW compost: A review and an assessment, Biomass Bioenergy, 1992, 3(3–4), 267–279, DOI: 10.1016/0961-9534(92)90031-K [17] Weber, J.; Karczewska, A.; Drozd, J.; Licznar, M.; Licznar, S.; Jamroz, E.; Kocowicz, A.: Agricultural and ecological aspects of a sandy soil as affected by the application of municipal solid waste composts, Soil Biol. Unlike source-separated organic waste, undersized fraction of municipal solid waste (UFMSW) from mixed household waste streams contains both organic and inorganic material, limiting its suitability for conventional composting. Keywords: b20; concentrations; content; control; doi; growth; municipal; plant; soil; solid; ufmsw; waste
- Product Composition Control of a New Batch Pressure Swing Rectifying System by Kopasz, Á.; Modla, G.; Láng, P. (2009) - We got simlar results for the value of the minimal overall specific energy consumption in both cases (composition control, temperature control, which is applied most commonly in the industry). The goals of this paper: - to propose and study a simple control scheme with PID parameters (providing good quality of control) for the new configuration, - investigation of the influence of the liquid division ratio, - determination of optimal value of liquid division ratio (providing the prescribed separation with minimal specific energy consumption). Keywords: batch; column; composition; control; division; liquid; ratio
- Motion Simulation of a Path Controlled Vehicle by Antal, D. (2010) - By the use of such vehicles, one can decrease the expenditure of the production cost and increase the operational efficiency and its reliability. In addition to logistics wide range of applications of such vehicles can be found e.g., scanning on a minefield or mowing the lawn automatically. Keywords: control; distance; methods; model; motor; path; position; vehicle
- High-Tech Boat by Lénárt, J. (2010) - /SVE /TUR /UKR /ENU (Use these settings to create Adobe PDF documents best suited for high-quality prepress printing. (Za stvaranje Adobe PDF dokumenata najpogodnijih za visokokvalitetni ispis prije tiskanja koristite ove postavke. Keywords: adobe; boat; computer; control; i2c; interface; motors
- Comparison of Scalar and Vector Control Strategies of Induction Motors by Kohlrusz, G.; Fodor, D. (2011) - The models of the closed-loop V/Hz and the rotor flux- oriented control were implemented in MatLab/Simulink. Figure 4: Closed-loop V/Hz constant control There are some methods which use current control. Keywords: control; current; flux; phase; rotor; speed; stator; torque; voltage
- Editorial Preface by , (2014) - traditional, intelligent, adaptive, etc.) • process monitoring and supervision • system identification and signal processing • bioengineering • traffic control • reaction kinetic networks • modelling of complex systems (classical, hierarchical, Bayesian, fuzzy, networks) • image processing and pattern recognition • artificial intelligence • soft computing (neural, genetic, fuzzy algorithms, etc.) • software (parallel computing, distributed and network computing, data visualization) • decision making (decision support, data mining) • applications of systems and control theory You are invited to participate at the 14th International PhD Workshop in Veszprém in 2015! Keywords: control
- Effect of Algae Treatment on Stevia Rebaudiana Growth by Czinkóczky, Réka; Németh, Áron (2018) - A comparison between heterotrophic algae treatment and the control samples is shown in Fig. 9B. The p-value was 0.003, i.e. a significant difference ex- ists between them and heterotrophic algae treatment is also beneficial. Keywords: algae; control; fig; growth; rebaudiana; treatment
- Editorial Preface to The Special Issue Dedicated to the 15th International PhD Workshop on Systems and Control by Attila Magyar guest editor by Magyar, Attila (2019) - • process modeling and analysis; control (traditional, intelligent, adaptive, etc.) • system identification and signal processing • electrical transmission systems, smart grids • bioengineering • traffic control • reaction kinetic networks • artificial intelligence • soft computing (neural, genetic, fuzzy algorithms, etc.) • software issues (parallel computing, distributed and network computing, data visualization) • decision making (decision support, data mining) • applications The organizers are grateful to the authors for their contributions. This issue represents the entire spectrum of systems and control engineering as follows: Keywords: control
Case
- Improving the compatibility of man-made fibre reinforced composites by Varga, Cs.; Miskolczi, N.; Bartha, L.; Lipóczi, G.; Falussy, L. (2008) - Fibre reinforced composites are unique materials and are heterogeneous in composition. In fibre reinforced composites the phases strengthen each others effect due to the interaction between the fibres and the matrix compensating the worse properties of the clean components. Keywords: additive; carbon; case; composites; fibre; properties; tensile
- Flow pattern within hydrocyclone by Németh, J.; Verdes, S. (2011) - Figure 5: Tangential velocity distributions In all the three cases the diameters of the hydrocyclones, the quantity of input liquid flow, its velocity and pressure were near identical. Figure 8: Tangential velocity distribution in case of a fluid with different viscosity Theoretically it was only to be expected, because neither in the whirl rotating as a rigid body neither in the potential whirl the viscosity does not play a role. Keywords: air; case; core; diameter; distributions; figure; flow; hydrocyclone; kelsall; liquid; particle; radial; velocity; velocity distributions
- Toxicology Aspects of the Decomposition of Diuron by Advanced Oxidation Processes by Alapi, Tünde; Simon, Gergő; Veréb, Gábor; Kovács, Krisztina; Arany, Eszter; Schrantz, Krisztina; Dombi, András; Hernádi, Klára (2015) - Direct UV photolysis is a quite selective method for the transformation of organic substances and can be effective for the transformation of compounds, which highly absorb at 254 nm (such as diuron and probably its aromatic intermediates), mainly by the dissociation of the carbon-halogen bond. The initial rates of transformation of diuron are in the order of ozonation < heterogeneous photocatalysis < UV photolysis < combination of UV photolysis and ozonation. Keywords: case; combination; decomposition; diuron; ozonation; photocatalysis; photolysis; transformation; uv photolysis
- Comparison of Decontamination Standards by Hao, Le Cong; Thuy, Mai Dinh; Hieu, Do Trung; Sas, Zoltán (2015) - [8] Varga, K.; Baradlai, P.; Hirschberg, G.; Nemeth, Z.; Oravetz, D.; Schunk, J.; Tilky, P.: Corrosion behaviour of stainless steel surfaces formed upon chemical decontamination, Electrochim. Decontamination factors for MSZ-05 22.7662-83 using the adsorption method (Table 2). Keywords: 137cs; 60co; case; decontamination; ease; hungarian; iso; standard
- Biocomponent-Based Quality Improvement Opportunities of Binders for Road Construction by Tálosi, Gréta; Gergó, Péter; Holló, András (2019) - The raw materials of the processed biomass that produce bio-oils include microal- gae Yang et al. examined bio-oils derived from waste wood resources as bitumen modifiers and extenders Keywords: asphalt; binders; biocomponent; bitumen; case; oil; properties; samples
Samples
- Antioxidant Effect of Humic Substances from Hungarian Leonardite by Csicsor, Attila; Tombácz, Etelka (2022) - Keywords: humic substances, humic acid, fulvic acid, himatomelanic acid, antioxidant, leonardite 1. The aim of this research is to compare the antioxidant properties of humic acids with already well- known natural antioxidants. Keywords: acids; antioxidant; capacity; humic; samples; substances
- A Survey of Sars-Cov-2 Genetic Material Reduction During a Traditional Wastewater Treatment Technology by Adamcsik, Orsolya; Gerencsér-Berta, Renáta; Oláhné Horváth, Borbála; Kovács, Nikoletta; Somogyi, Viola; Domokos, Endre Gábor; Kemenesi, Gábor; Tóth, Endre Gábor; Jakab, Ferenc; Galambos, Ildikó (2022) - Introduction During the transmission of severe acute respiratory syn- drome coronavirus 2 (SARS-CoV-2) since the start of the COVID-19 pandemic, wastewater-based epidemiol- ogy (WBE) has gained a considerable amount of atten- tion as a surveillance system. The aim of this work is to assess the presence and concentration of SARS-CoV-2 RNA in un- treated and treated wastewater samples. Keywords: cov-2; doi; effluent; influent; rna; samples; sars; wastewater
- Annealing Effect on Copper-Doped Sodo-Borate Glasses (Na2O-4B2O3) by Aboutaleb, Djamila; Safi, Brahim (2023) - The measured densities of glass samples Samples (g/cm3) NB1-NA 1.857 NB2-NA 1.988 NB3-NA 2.100 NB4-NA 2.219 NB5-NA 2.250 NB1-A 2.134 NB2-A 2.170 NB3-A 2.200 NB4-A 2.220 NB5-A 2.261 ABOUTALEB AND SAFI Hungarian Journal of Industry and Chemistry 18 their structures before and after annealing by, for example, XRD (Figure 2). Soc., 1996, 79(9), 2247–2256, DOI: 10.1111/j.1151-2916.1996.tb08969.x [23] Van Wüllen, L.; Gee, B.; Zuchner, L.; Bertmer, M.; Eckert: V. phisicochemical methods of glass characterization connectivities and cation distributions in oxide glass: New result from solid state NMR, Phys. Keywords: annealing; borate; cuo; effect; glass; glasses; nb1; nb2; properties; samples; structure
- Influence of TiC on Density and Microstructure of Al₂O₃ Ceramics Doped with Nb₂O₅ and LiF by Silveira, Pedro Henrique Poubel Mendonça Da; Gomes, Alaelson Vieira (2023) - Density of sintered samples The density and densification of the sintered ceramic bodies were calculated based on the standard ABNT NBR 16667:2017 [26]. [2] Wisdom, A.; Mark, U.; Zeberu, E.; Adeleke, A.: Optimisation of the physical properties of rice husk ash in ceramic materials using the response surface methodology, Hung. Keywords: al2o3; ceramic; composites; densification; density; doi; lif; nb2o5; samples; sintering; tic
- Evaluation of the Effect of Castor Oil-Based Experimental Additives on Pla/Starch Foils by Nagy, Bianka; Miskolczi, Norbert; Eller, Zoltán (2024) - Keywords: biopolymers, starch, polylactic acid, castor oil, PLA/starch foils 1. PLA is often blended with starch to increase its biodegradability and reduce feedstock costs [9]. Keywords: additives; doi; foils; packaging; pla; plastic; properties; samples; starch; tensile
- Investigation the Properties of Y-Ba-Cu-Oxide Superconductors Prepared by Hydraulic Pressing and Molding by Maloveczky, Anna; Enisz-Bódogh, Margit; Kulcsár, Tamás (2014) - A granular ceramic layer would require a larger thickness, but in all cases the thickness and weight of the superconducting shields would be much less than those of magnetic materials providing a comparable effect. Vortex pinning in heavily Pb-doped Bi2212 crystals Physica C 1999, 324, 211–219 [10] GRADER G.S., JOHSON D.W.: Forming methods for high Tc superconductors, Thermochimica Acta, 1991, 174, 239–251 [11] KOMLAI K.: Investigation of the the properties of the incongruent melting reaction of YBa2Cu3O-y superconductor phase, M.Sc. Keywords: hydraulic; magnetic; materials; phase; properties; samples; shielding; superconductors
- The Effect of Highway Traffic on Heavy Metal Content of Cow Milk and Cheese by Kodrik, L.; Wagner, L.; Imre, K.; Polyak, K.F.; Besenyei, F.; Husveth, F. (2011) - Approximately 0.5 g of both cheese and feed, and 5 mL of milk samples were transferred into teflon vessels and 8 mL of nitric acid (HNO3, 65% Suprapur®, Merck) and 2 mL of hydrogen peroxide (H2O2, TraceSELECT® Ultra) were mixed. Results and Discussion Metal concentrations in milk samples Ten heavy metals were detected in the cow milk: As, Cd, Cr, Cu, Fe, Mn, V, Ni, Pb and Zn. Keywords: areas; cheese; concentrations; cow; elements; highway; metals; milk; samples
- Mineral Matter in Nigerian Coals and Tar Sand and their Implications in Binary Blend Formulation and Co-carbonisation by Ryemshak, Solomon A.; Jauro, Aliyu; Chindo, Istifanus Y.; Ekanem, Eno O. (2015) - Coal samples from Afuze (AFZ) and Chikila (CHK) were found to contain quartz, hematite, and anhydride as the dominant minerals. The observed minerals are commonly reported in coal samples worldwide [10]. Keywords: ash; coal; coke; furnace; matter; mineral; quartz; samples; sand; slag; tar
Oil
- Investigation of Enzyme-Catalyzed Transesterification of Used Frying Oils by Kovács, S.; Krár, M.; Hancsók, J. (2008) - Methyl ester content of the product prepared from the 50-50% mixture (MIX) of high oleic sunflower oil and used frying oil was between the results of the previous two. This paper presents the results of some experiments made by applying used frying oils and a process which is studied less intensively in the literature. Keywords: content; ester; frying; methyl; oil; oils; transesterification
- Comparison of Calibration Models Based on Near Infrared Spectroscopy Data for the Determination of Plant Oil Properties by Fülöp, A.; Hancsók, J. (2009) - PLS model This approach is the most popular chemometric method for calibration model creation. 119-122 (2009) COMPARISON OF CALIBRATION MODELS BASED ON NEAR INFRARED SPECTROSCOPY DATA FOR THE DETERMINATION OF PLANT OIL PROPERTIES A. Fülöp, J. Hancsók University of Pannonia, Department of Hydrocarbon and Coal Processing P. O. Box 158., H-8201 Veszprém, Hungary, Phone: +3688624414, Fax:+3688624520 The aim of this study was to compare the prediction efficiency of different type of linear calibration models using near infrared (NIR) absorbance spectral data of vegetable oils. Keywords: ann; model; oil; pca; validation
- Synthesis, Physico-Chemical Properties, and Spectroscopic Characterization of Phenolic Modified Castor Oil Based Polyol by Vazid, A.; Urvashi, V.; Jyotsna, K.; Alhadi Faroun, S. A.; Mohd, I. (2012) - In the second and third set, castor oil and phenolic resin concentration were kept constant in all the three prepared polyol samples with varying concentrations of diethylene glycol and diethanolamine as shown in Table 1. In the present study, castor oil has been modified with blending phenolic resin and reacted with diethanolamine (DEA) and diethyleneglycol (DEG) to synthesize the polyol. Keywords: ch3; coefficient; dea; deg; oil; phenolic; polyol; properties; resin
- Hydrocarbon Fractions Obtained from Recycling of Waste Materials by Borsodi, N.; Miskolczi, N.; Lázár, I.; Bartha, L.; Gerencsér, A. (2011) - Contaminant level of liquid products Chlorine and nitrogen content of liquid product was measured. Pyrolysis products are similar to the hydrocarbon- fractions generated in an oil refinery, therefore they can be used as fuels or petrochemical feedstock [1-4]. Keywords: catalysts; composition; liquid; material; oil; products; pyrolysis; zeolite
- Microencapsulation of Vegetable Oil - Alternative Approaches Using Membrane Technology and Spray Drying by Albert, Krisztina; Vatai, Gyula; Koris, András (2017) - [10] Turchiuli, C.; Jimenez Munguia, M.T.; Hernandez Sanchez, M.; Cortesferre, H.; Dumoulin, E.: Use of different supports for oil encapsulation in powder by spray drying, Powder Technol., 2014 255, 103– 108 DOI 10.1016/j.powtec.2013.08.026 Oil encapsulation efficiency of microcap- sules. Keywords: doi; emulsification; membrane; microcapsules; microencapsulation; oil; phase; spray; � �
- Comparison Between Static and Dynamic Analyses of the Solid Fat Content of Coconut Oil by Dhaygude, Vinod; Soós, Anita; Zeke, Ildikó; Somogyi, László (2018) - These data can be used by food manufacturers to optimize processing conditions for modified coconut oil and food products fortified with coconut oil. Considering the significant scientific and practical im- portance of the physical properties of coconut oil from a few studies, the solid fat content determined by NMR and DSC methods was investigated and the obtained results compared. Keywords: blends; coconut; content; fat; oil
Rate
- STOCHASTIC MODEL OF FIRST ORDER CHEMICAL REACTIONS TAKING PLACE IN PARTICLES by Blickle, T.; Bezegh, A.; Mihálykó, Cs. (2002) - Keywords: stochastic model, particle dispersion processes, iron oxide red production, conversion rate, product homogeneity, momentum equation, particulate system Introduction During the years of the '50s, an intensive research was lead by Prof. K. Polinszky, to study the properties of inorganic pigments and their production methods. In steady layer system 7: -t 0 and l = 1; in rotating kiln when e is a given value: l = !. Keywords: rate
- RHEOLOGY OF ALUMINA SLIPS by Papo, A.; Piani, L. (2001) - In the light of what said above, the knowledge and control of the rheological properties of alumina suspensions is of paramount importance for improving both the production processes and the quality of final products. This article is part of a research program which has been undertaken in order to thorougly characterise the rheological behaviour of alumina suspensions under both continuous and oscillatory flow conditions. Keywords: alumina; flow; quemada; rate; shear; suspensions; viscosity
- Modelling of Polymer Particle Formation Using Population Balance Model by Bárkányi, Á.; Lakatos, B. G.; Németh, S. (2010) - t=1.3e3 sec t=3.8e3 sec t=7e3 sec t=1.1e4 sec t=1.5e4 sec t=1.8e4 sec t=1.9e4 sec t=2.1e4 sec t=2.3e4 sec Figure 7: Primary particle size distribution 0 1 2 x 10-40 1 2 x 104 0 2 4 6 8 x 10-17 diameter of particle (m) time (s) fu nc tio n va lu e Figure 8: Primary particle size distribution (3D) Figs 7 and 8 show the primary particle size distribution. The morphology of the PVC grains is depended on the properties of primary particles. Keywords: aggregation; distribution; moment; monomer; order; particles; phase; polymerization; rate; size
- KINETIC STUDY OF BLUE M–EB DYE SORPTION ON ION EXCHANGE RESINS by Şuteu, D.; Bîlbă, D.; Zaharia, C. (2002) - Taking into account the rate constants, K , at two different temperatures, the activation energy~ Ea. required for sorption process was calculated using Arrhenius equation: K = Koexp( -EaiRT) (3) where Ea is the activation energy/ J mor1 and R- gas constant= 8.3144 Jmor1 K-1 • The values of activation energy (Table 3) have confirmed the diffusion nature of dye sorption. Conclusions Research on the kinetics of Blue M-EB reactive dye sorption by using Purolite anion exchangers of both gel and macroporous structures has resulted in the conclusion that dye sorption is limited by intraparticle diffusion and follows moving - boundary behavior. Keywords: blue; diffusion; dye; purolite; rate; resins; sorption
- Stability and Bifurcation of Continuous Cooling Crystallizers by Lakatos, B. G.; Moldoványi, N. (2005) - 49-56. (2005) STABILITY AND BIFURCATION OF CONTINUOUS COOLING CRYSTALLIZERS B.G. LAKATOS1and N. MOLDOVÁNYI2 1Department of Process Engineering, University of Veszprém, H-8201 Veszprém, P.O. Box 158, HUNGARY 2Honeywell Process Solutions, H-1139 Budapest Petneházy u. 2-4, HUNGARY Stability properties and dynamic behaviour of continuous cooling crystallizers are analysed using a detailed moment equation model. Keywords: Cooling crystallizer, moment equation model, causal loop diagram, stability, bifurcation Introduction Non-isothermal continuous crystallizers, extensively used in the chemical industry, usually are very sensitive to both the external and internal (parameter) disturb-ances. Keywords: bifurcation; crystallizer; feedback; nucleation; rate; stability; state
Properties
- POSSIBILITIES OF THE APPLICATION OF POLYISOBUTENYL SUCCINIC ANHYDRIDE DERIVATIVES OF VARIOUS MOLECULAR STRUCTURES by Kocsis, Z.; Baladincz, J.; Bartha, L.; Hancsók, J. (2001) - Keywords: ashless dispersants, detergents, polyisobutenyl succinic anhydride derivatives, interactions of additives Introduction The first innovations about polyalkenyl succtmc anhydride derivatives, used as ashless DD additives in engine oils, were published in the 60's. Polyisobutenyl succinimides Experimental The interactions between performance additives were studied extensively [7]. Keywords: additives; polyisobutenyl; properties; succinimides
- Study on Adsorption of Essential Oils on Polylactic Acid Microparticles by Virág, Lilla; Bocsi, Róbert; Pethő, Dóra (2022) - The uptake of essential oil solution did not change significantly (∼60%) by varying either the type of solvent used for PLA preparation or PLA particle size. Keywords: polylactic acid, microparticles, essential oil adsorption, Hansen solubility parameters 1. Keywords: adsorption; essential; microparticles; oils; particles; pla; properties; size; solution; solvent
- Reuse of Fine Concrete Demolition Wastes as a Supplementary Cementitious Material in Concrete by Kheddache, Lynda; Aboutaleb, Djamila; Safi, Brahim; Lecheb, Samir; Chellil, Ahmed; Mechakra, Hamza (2024) - The results showed that the addition of up to 10% of concrete demolition waste significantly improved physical properties such as the air void content and workability of fresh concrete. This indicates that concrete demolition waste (finely crushed) can replace cement and therefore contribute to reducing binder consumption. Keywords: cdw; cement; compressive; concrete; demolition; doi; figure; materials; properties; strength; waste
- Investigation of Producing Modern Base Oils by Pölczmann, Gy.; Baladincz, J.; Hancsók, J. (2008) - Main goals of these experiments were to produce high quality base oil and high quality gas oil as co-product. PÖLCZMANN1 , J. BALADINCZ2, J. HANCSÓK1 1University of Pannonia, Department of Hydrocarbon and Coal Processing 8200 Veszprém, Egyetem u. 10., Pf.: 158, HUNGARY E-mail: polczmann@almos.uni-pannon.hu 2Slovnaft, a.s., Vlčie hrdlo 1, 824 12 Bratislava, SLOVAKIA Modern lube oils are prepared from base oils (base oil mixtures) and additives. Keywords: base; content; engine; oils; properties; quality; sulphur; viscosity
- Investigation of Modified PIB-Succinimides in Low SAPS Engine Oils by Sági, R.; Bartha, L.; Baladincz, J. (2009) - On the other hand, engine oil seal compatibility tests have become more important and severe in the recent engine oil performance levels (API CI-4, CJ-4; ACEA Ax/Bx, Cx, Ex; JASO DH-1 etc.). In the greatest volume dispersant additives, mainly polyisobuthylene- succinimide types are used in the formulation of engine oils. Keywords: dispersant; engine; oils; properties; seal; znddp
- Improving the Interfacial Properties of Glass Fibre Reinforced and Unreinforced Waste Sourced Low Density Polyethylene/Acrylonitrile Butadiene Styrene/Polystyrene Composites by Sója, János; Sedlarik, Vladimir; Kucharczyk, Pavel; Miskolczi, Norbert (2014) - Properties of compatibilized nylon 6/ABS blends: Part II. Effects of compatibilizer type and processing history, Polymer, 2000, 41(1), 239–258 [5] HUSSEIN I.A., HAMEED T., SHARKH B.F.A., MEZGHANI K.: Miscibility of hexene-LLDPE and LDPE blends: influence of branch content and composition distribution, Polymer, 2003, 44(16), 4665–4672 On the contrary, the untreated LDPE/ABS/PS composites have tensile strength of 15.3 MPa without fibres, and 16.8 MPa in the presence of 20% glass fibre. Keywords: abs; glass; ldpe; mpa; properties; strength; tensile
- Effect of Multi-Walled Carbon Nanotube Content on Dynamic Mechanical Properties and Crystallinity of polypropilene composites by Szentes, A.; Horváth, G.; Varga, Cs.; Harrach, G. (2011) - Carbon nanotubes are promising additives for polymer composites due to their excellent mechanical, electrical, and thermal properties. Small but strong: A review of the mechanical properties of carbon nanotube–polymer composites, Carbon, 44, (2006), 1624–1652 6. Z. SPITALSKY, D. TASIS, K. PAPAGELIS, C. GALIOTIS: Keywords: carbon; composites; extruder; melting; nanotubes; properties; screw
- Degradation of Reinforced and Unreinforced Waste Polyamides During Mechanical Recycling by Sólya, János; Miskolczi, Norbert (2021) - The paper discusses the degradation of waste polyamides during mechanical recycling from the automotive sector. Conclusions We investigated the reprocessing of waste glass fibre reinforced and unreinforced polyamide 6.6 materials. Keywords: cycles; glass; mpa; number; polyamide; properties; reprocessing; tensile
- Group Contribution Method-based Multi-objective Evolutionary Molecular Design by Dörgő, Gyula; Abonyi, János (2016) - In the case of CAMD problems, explicit constraints are evaluated through property estimation methods, these can be, for example, critical properties, solubility indexes, normal boiling points, etc. As the new molecules created in the ‘reverse’ problem are evaluated via property estimation methods to verify the satisfaction of properties, the success of CAMD tasks depends on, to a large extent, the reliability of the estimation method being used. Keywords: algorithm; design; doi; groups; number; properties; property; set; solutions
Phase
- Sensorless Rotor Position Detection of PMSM for Automotive Application by Fodor, D.; Medve, H.; Szalay, I.; Kulcsár, T. (2010) - A novel method of detecting for rotor position of a sensorless brushless DC motor, ICEMS. The construction of permanent magnet synchronous motors yields the advantages mentioned above but they do not have only bright side. Keywords: flux; magnet; model; phase; position; reluctance; rotor; sensorless; voltage
- Analysis and Modeling of Slotless Permanent Magnet Synchronous Motors by Szalay, I.; Medve, H.; Fodor, D. (2011) - The most promising sensorless method for precise initial position detection is high frequency signal injection, which is able to transform the effect of anisotropic characteristics of Nd2Fe14B permanent magnet rotor into angle dependent electrical quantities. In the focus of the performed measurements was the data acquisition for developing the high frequency injection based sensorless rotor position detection method of the PMSMs at zero speed. Keywords: difference; flux; magnet; measurement; phase; position; reluctance; rotor; voltage
- Investigation of Reverse Phase SMB-Chromatographic Bioseparations of Amino Acid Aqueous Solutions by Molnár, Z.; Nagy, M.; Aranyi, A.; Hanák, L.; Szánya, T.; Argyelán, J. (2004) - Description of production-scale SMB-LC and small-laboratory SMB-LC equipments There are geometric and other parameters of the 4- column production scale SMB-LC equipment being constructed by the Central Workshop of University of Veszprém: column number is four and made of stainless steel. Desalting of DL-β-phenylalanine was studied on a small-laboratory scale simulated moving bed (SMB) preparative liquid chromatograph (number of columns=6, column length=125mm, column I.D.=13mm). Keywords: amino; cm3; column; glycine; min; phase; phenylalanine; smb; solution; zone
Parameters
- Evolutionary Strategy in Iterative Experiment Design by Madár, J.; Balaskó, B.; Szeifert, F.; Abonyi, J. (2005) - The obtained model output vs. the ‘true’ solid: system, dashed: Method 2 dotted: Method 3 Conclusions The estimation of model parameters largely depends on the information content of the experimental data presented to the parameter identification algorithm. The goal of the experiment design is to determine an optimal input profile in the sense of the parameter estimation leads to optimal parameters with maximal confidence. Keywords: design; estimation; experiment; model; oed; parameters
- Analysis of Roughness Parameters Determining Tribological Properties in Hard Turned Surfaces by Molnár, Viktor; Sztankovics, István (2022) - Keywords: wear-resistance, hard turning, surface roughness 1. Mater., 2013, 527, 167–172 DOI: 10.1016/j.precisioneng.2016.06.001 [6] Kundrak, J.; Nagy, A.; Markopoulos, A.P.; Karka- los, N.E.: Investigation of surface roughness on face milled parts with round insert in planes parallel to the feed at various cutting speeds. Keywords: doi; fluid; parameters; retention; roughness; surfaces; wear
- Parameter Sensitivity Analysis of a Synchronous Generator by Fodor, A.; Magyar, A.; Hangos, K. M. (2010) - After the basic dynamical analysis, the set of model parameters is partitioned based on the model's sensitivity on them. Generator parameters Because the above developed model uses pseudo- parameters that are composed from the original physical ones, mathematical expressions are needed to describe how these parameters depend on the physical ones. Keywords: generator; model; parameters; rotor; sensitivity; state; stator; ⎢ ⎢; ⎥ ⎥
- Extraction Examinations of Microalgae Propagated for Biodiesel Additives by Bocsi, R.; Horvath, G.; Hanak, L.; Hodai, Z. (2011) - In this case algae suspension flows in a canal. If we make several processes on algae suspension from concentrating to drying, we should extract the widest range of compounds of biomass. Keywords: algae; biomass; co2; compounds; extraction; light; microalgae; parameters; technology; type; use
- Cutting of Aluminium Alloy by Abrasive Waterjet by Kun-Bodnár, K.; Maros, Zs. (2011) - Figure 2: Kerfing in glass 212 From technological parameters affecting on the efficiency we investigated the effect of the feed rate, pressure, and abrasive mass flow (mass of the abrasive grains given to the waterjet during unit time). MAROS University of Miskolc, Department of Production Engineering, H-3515 Miskolc – Egyetemváros, HUNGARY E-mail: krisztina.bodnar@uni-miskolc.hu E-mail: zsolt.maros@uni-miskolc.hu Aluminium sheets are cut several times by abrasive waterjet cutting. Keywords: cutting; depth; kerf; parameters
- Identification of the material properties of an 18650 Li-ion battery for improving the electrochemical model used in cell testing by Csomós, Bence; Fodor, Dénes (2020) - [11] Huang, J.: Diffusion impedance of electroactive ma- terials, electrolytic solutions and porous electrodes: Warburg impedance and beyond, Electrochim. The present paper shows that CPE – and its QPE form – is a recommended choice to yield the best fit in terms of non-Fickian diffusion impedance. Keywords: battery; cell; circuit; cpe; diffusion; element; impedance; model; parameters; qpe; randles; soc; warburg
Treatment
- Anaerobic Membrane Bioreactors by Szentgyörgyi, E.; Bélafi-Bakó, K. (2010) - The MBR book, Elsevier, Oxford (2006). 5. B. Q. LIAO, J. T. KRAEMES, D. M. BAGLEY: Anaerobic membrane bioreactors: Applications and research directions, Critical Reviews in Environmental Science and Technology, 36, 2006, 489–530. 6. L. VAN DIJK, G. C. G. RONCKEN: Membrane bioreactors for wastewater treatment: The state of the art and new developments, Water Science and Technology, 35, 1997, 35. 7. K. H. CHOO, I. J. KANG, S. H. YOON, H. PARK, J. H. KIM, S. ADIYA, C. H. LEE: Approaches to membrane fouling control in anaerobic membrane bioreactors, Water Science and Technology, 41, 2000, 363–371. 8. STOWA: pp. 181-185 (2010) ANAEROBIC MEMBRANE BIOREACTORS E. SZENTGYÖRGYI , K. BÉLAFI-BAKÓ Research Institute of Chemical and Process Engineering, University of Pannonia Egyetem u. 10, Veszprém, HUNGARY E-mail: szentgyorgyi@almos.uni-pannon.hu The aim of this work was to give a general overview on the type and behaviour of anaerobic membrane bioreactors, which are intensively studied for waste water treatment processes. Keywords: anaerobic; biomass; cake; conditions; flux; formation; mbrs; membrane; sludge; treatment; wastewater
- Heavy Metal Balance in a Communal Wastewater Treatment Plant by Gulyás, Gábor; Pitás, Viktória; Fazekas, Bence; Kárpáti, Árpád (2015) - The sludge reprocessing and reuse pose no problems in the plant with respect to heavy metal content. The mechanism of heavy metal removal in the activated sludge process is not completely understood yet Keywords: content; metal; plant; removal; sludge; treatment
- Application of Ionic Liquids in the Utilization of the Agricultural Wastes: Towards the One-step Pre-treatment And Cellulose Hydrolysis by Megyeri, Gábor; Nemestóthy, Nándor; Polakovic, Milan; Bélafi-Bakó, Katalin; Gubicza, László (2015) - Keywords: ionic liquid, enzyme, hydrolysis, glucose, agricultural waste, lignocellulose 1. Ionic liquids are salts with low melting points Keywords: cellic; cellulose; doi; glucose; hydrolysis; pre; treatment
- The Effect of Advanced Oxidation Pre-Treatment on the Membrane Filtration Parameters of Dairy Wastewater by Zakar, Mihály; Kovács, Ildikó; Muhi, Péter; Hanczné Lakatos, Erika; Keszthelyi-Szabó, Gábor; László, Zsuzsanna (2017) - Membrane treatment of dairy wastewater with the aim of water reuse could simultaneously lower the total water consumption and effluent production of dairy plants, as the purified water produced could be reused in a dairy plant to heat or cool water. [1] Farizoglu, B.; Uzuner, S.: The investigation of dairy industry wastewater treatment in a biological high performance membrane system, Biochem. Keywords: dairy; fenton; filtration; flux; fouling; membrane; ozone; pre; treatment; wastewater
Results
- Evaluation of PC-FMEA Using Network Analysis by Ungvári, Edina; Gyurika, István Gábor (2022) - Applying these two solutions together, a form of risk assessment can be created where risks are assessed by pairwise comparisons and the results analyzed using network research tools. Keywords: Network science, PC-FMEA, risk assessment, pairwise comparison 1. Keywords: fmea; network; pairwise; results; risk
- Nonlinear Dielectric Effect of Two-Component Dipolar Fluids by Nagy, S.; Szalai, I. (2010) - Linear dielectric permittivities with (m1 *)2 = 0 and (m2 *)2 = 1 62 Figure 2b: Nonlinear dielectric permittivities with (m1 *)2 = 0 and (m2 *)2 = 1 Figure 3a: Linear dielectric permittivities with (m1 *)2 = 0 and (m2 *)2 = 0.5 Figure 3b: Nonlinear dielectric permittivities with (m1 *)2 = 0 and (m2 *)2 = 0.5 Summary In the present study of the NDE for DHS mixtures, the following main results have been obtained: 1) From the electric field dependence of the polarization analytical equations have been obtained for the linear and the nonlinear dielectric constants of two- component DHS fluids. Nonlinear dielectric permittivities with (m1 *)2 = 0.5 and (m2 *) = 1 Figure 2a: Keywords: component; dielectric; dipole; linear; permittivity; results
- Seasonal Changes in Weed Vegetation on Arable Pannonian Sand and Loess Lands in Hungary by Tóth, A.; Balogh, Á.; Wichmann, B.; Dancza, I.; Szalkay, Cs.; Penksza, K. (2011) - Owing to these processes, significant changes appeared in the dominance relations of arable weed species, thus invasion of some of them intensified, while others were forced back. The figure represents mean percentage weed species cover as the result of all 3 surveys conducted on the agricultural field. Keywords: agricultural; alfa; parcels; results; species; surveys; weed
- Some Analytic Expressions for the Capacitance and Profiles of the Electric Double Layer Formed by Ions Near an Electrode by Henderson, Douglas (2015) - The solid and broken curves give the results of the hybrid approach and GCS theory, respectively. by Islam et al. Because the MSA is a linearized theory, the MC, MSA, and GCS capacitances are for σ = 0. capacitance and everything else is ‘lumped’ into the in- ner layer capacitance. Keywords: capacitance; charge; chem; electrode; gcs; henderson; layer; msa; results; theory
- KINETIC STUDY AND MATHEMATICAL MODELLING OF GROWTH OF ARTHROBACTER OXYDANS CELLS COVALENTLY IMMOBILIZED ON CELLULOSE GRANULES by Yotova, L.; Tsibranska, I.; Lalov, I.; Karsheva, M.; Krysteva, M. (2002) - Analytical procedures Measurement of cell growth Biomass of free cells and those, produced by immobilized cells was measured spectrophotometrically at 600 nm wave length (Perkin- Elmer spectrophotometer, Lambda 2, Germany). Conclusions From the results obtained with covalently immobilized Arthrobacter oxydans cells the following mechanism of cell growth could be proposed: The kinetics of growth for immobilized cells is different and their replication is faster than those of the free ones. Keywords: cells; growth; kinetic; mass; oxydans; results; substrate
Simulation
- Using Finite Element Analysis in the 3D Printing of Metals by Alzyod, Hussein; Ficzere, Péter (2022) - [6]. Processing The thickness of layers (mm) Directed energy deposition 0.089 − 0.203 Powder bed fusion 0.08 − 0.15 Sheet lamination 0.1 − 0.19 Binder jetting 0.089 − 0.203 https://doi.org/10.33927/hjic-2021-24 mailto:hussein.alzyod@edu.bme.hu 66 ALZYOD AND FICZERE Figure 1: Types of Additive Manufacturing processes based on the state of raw materials [1]. Figure 2: Classification of metal additive manufacturing technologies [5]. in many sectors like in the aviation, automotive, medical implants, material handling robotics as well as lifestyle and sport industries. Keywords: additive; calibration; expansion; factor; manufacturing; printing; simulation; volumetric
- Simulation of Fluid Flow, Combustion and Heat Transfer Processes in Internal Combustion Engines by Morauszki, T.; Mándli, P.; Horváth, Z.; Dreyer, M.R. (2011) - Keywords: Internal combustion engines, Air flow simulation, Direct-injection, Spark ignition, Combustion Introduction Although internal combustion engine development has in certain aspects already approached its limits, just by looking ahead to the upcoming tightening of the emission norms, it is clear that further optimization is inevitable. The main goal of this work is to develop and present a complex simulation method for evaluating important physical properties in the combustion chamber of a gasoline direct injection engine, such as air flow in the combustion chamber, direct injection of gasoline, mixture formation, spark ignition and combustion processes, heat generation and heat transfer from hot air to the surrounding solid walls. Keywords: air; combustion; exhaust; fig; flow; intake; simulation; stroke
- Calculating the Electrostatic Potential Profiles of Double Layers from Simulation Ion Density Profiles by Boda, Dezső; Gillespie, Dirk (2021) - �1) = � d (x) dx ���� x!�1 = 0 (9) and the same for x ! A special MC step, where a small amount of charge, ��, is transferred from one electrode to the other, has been introduced. Keywords: charge; chem; ensemble; phys; potential; simulation; voltage
- Simulation of Electrical Grid with OMNET++ Open Source Discrete Event System Simulator by Milán, Sőrés; Fodor, Attila (2016) - Keywords: energy transmission, electrical networks simulation, distributed energy systems 1. 85–91 (2016) hjic.mk.uni-pannon.hu DOI: 10.1515/hjic-2016-0010 SIMULATION OF ELECTRICAL GRID WITH OMNET++ OPEN SOURCE DISCRETE EVENT SYSTEM SIMULATOR MILÁN SŐRÉS AND ATTILA FODOR* Department of Electrical Engineering and Information Systems, University of Pannonia, Egyetem út 10., Veszprém, 8200, HUNGARY The simulation of electrical networks is very important before development and servicing of electrical networks and grids can occur. Keywords: current; network; omnet++; simulation
- Simulation of a balanced low-voltage electrical grid using a simplified network model by Greber, Márton; Fodor, Attila (2018) - The novel method of node powers is based on the general calculation technique of node voltages. Keywords: low-voltage distribution system, grid simulation, smart grid, method of node voltages, IEEE European Low-Voltage Test Feeder 1. Keywords: algorithm; current; iteration; method; network; node; power; simulation; voltage
Flow
- MATHEMATICAL EQUIVALENCE OF INFINITE MIXED FLOW REACTORS IN SERIES AND PLUG FLOW REACTOR by Renganathan, T.; Krishnaiah, K. (2002) - Keywords: chemical reactors, mixed flow reactor, plug flow reactor, residence time distribution, convergence Introduction The basic concept, that infinite mixed flow reactors (MFR) in series give the same performance as a plug flow reactor (PFR) is well known in chemical engineering for many years. Proof of Equivalence A series of mixed flow reactors (MFRs) with delta input are shown in Fig.l. Keywords: flow
- STUDY ON THE TURBULENCE IN PULSED STAGEWISE EXTRACTION COLUMNS: TURBULENT MACROSCALE by Angelov , G.; Gourdon , C. (2002) - The distribution of turbulent macroscale L over the stage is determined as depending on stage geometry and Re number. The results for turbulent macroscale L are obtained by simulation of incompressible Newtonian liquid flowing in a typical stage at various flow regimes and variable stage geometry. Keywords: area; column; distance; flow; macroscale; plate
Analysis
- 3D Scanning and Model Error Distribution-Based Characterisation of Welding Defects by Hegedűs-Kuti, János; Szőlősi, József; Varga, Dániel; Farkas, Gábor; Ruppert, Tamás; Abonyi, János; Andó, Mátyás (2022) - The results, treated as differences between components of point clouds, can be subsequently identified and grouped. The proposed CAD model–based method of the generation and analysis of error distributions The proposed framework starts by scanning with a 3D scanner before reducing the number of points in the re- sulting point clouds. Keywords: analysis; cad; cloud; defects; doi; method; point; quality; welding
- Nitrite and Nitrate Analysis by Capillary Electrophoresis with Direct UV Absorbance Detection: A Mini-Review by Farsang, Róbert; Hogyor, Kinga; Járvás, Gábor; Guttman, András (2025) - 73–78 (2025) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2025-20 NITRITE AND NITRATE ANALYSIS BY CAPILLARY ELECTROPHORESIS WITH DIRECT UV ABSORBANCE DETECTION: 75 µm I.D. 50 mM phosphate; pH 2.5 Reverse EOF due to the acidic buffer N/A 214 4.8 µM nitrate; 7.4 µM nitrite - 25 1.9 [30] NITRITE AND NITRATE ANALYSIS BY CAPILLARY ELECTROPHORESIS 53(2) pp. Keywords: analysis; capillary; doi; electrophoresis; i.d; nitrite; sample; separation
- Stability and Parameter Sensitivity Analyses of an Induction Motor by Fodor, Attila; Bálint, Roland; Magyar, Attila; Szederkényi, Gábor (2014) - As the final aim of our research is to estimate the param- eters of a particular Grundfos IM, first of all the resis- tances (Rs and Rr) of the IM were measured. We ac- knowledge also the investigated IM of Grundfos Hungary Producer Ltd. SYMBOLS C1, C2, C3 constant F damping constant φqs and φds q and d components of the stator flux φ′qr and φ′dr q and d components of the reduced rotor flux H inertia constant iqs and ids q and d components of the stator current i′qr and i′dr q and d components of the reduced rotor current Lm mutual inductance p number of pole pairs Rr and Lr rotor resistance and inductance R′r and L′r reduced value of rotor resistance and inductance Rs and Ls stator resistance and inductance vd and vq q and d components of the stator voltage ω angular velocity of the magnetic field ωr angular velocity of the rotor Tmech mechanical torque REFERENCES Keywords: analysis; model; state
- Dynamic Simulator-Based APC Design for a Naphtha Redistillation Column by Szabó, László; Kubovicsné Stocz, Klára; Szabó, Laura; Németh, Sándor; Szeifert, Ferenc (2017) - On the lower level of the control hierarchy controllers were created which facilitated normal operating conditions of the column (pressure and liquid- level controllers) and eliminated the disturbances of the environment (mass flowrate controllers). The resulting inferential calculations have already been implemented and are available for the operators to facilitate quality control. Keywords: analysis; column; controllers; quality; simulator; structure
- Capillary Electrophoretic Analysis of Exhaled Breath Condensate in the Diagnosis of Gastroesophageal Reflux Disease by Kubáň, Petr; Ďurč, Pavol; Lačná, Júlia; Greguš, Michal; Foret, František; Dolina, Jiří; Konečný, Štefan; Doubková, Martina; Kindlová, Dagmar; Pokojová, Eva; Skřičková, Jana (2018) - EBC samples were collected from several healthy volunteers and a group of patients suffering from symptoms attributed to gastroesophageal reflux disease. Capillary electrophoresis was used to ana- lyze the ionic content of EBC samples and differences in selected ion concentrations were identified between the groups. Keywords: analysis; anions; cations; ebc; reflux; separation
Pressure
- Separation of a Ternary Homoazeotropic Mixture by Pressure Swing Batch Distillation by Modla, G.; Lang, P. (2008) - Conclusion The separation of a ternary mixture (n-pentane-acetone- cyclo-hexane) with pressure swing batch distillation was investigated by feasibility studies and rigorous simulation calculations. 10. MODLA G., LANG P., KOPASZ A.: „Entrainer selection for pressure swing batch distillation”, ESCAPE-18, Lyon, 6 pages on CD (2008). 11. Keywords: azeotrope; batch; column; composition; distillation; pressure; separation; swing
- Pvd Coating and Up-to-date Wear Test of Hot-Forming Tools by Táncsics, F.; Halbritter, E. (2012) - On the basis of the largest diameter of the barreling work-piece, the approximating value of friction coefficient was determined and wear depth was numerically calculated. Experimental determination of friction coefficient During actual forming, in Rába’s forging plant, under production conditions 10 cylindrical specimens were upset between newly machined parallel pressure plates with surface roughness of Ra = 0.25. Keywords: coefficient; figure; friction; piece; pressure; wear; work
- Study of the Properties of a Plain Cathode Grimm-Type Dc Glow Discharge Source Operated in a Current-controlled Pulse Regime by Bánhidi, O. (2012) - By using constant current pulses, the state of the system can also be controlled. To provide constant current pulses, a current generator is needed. Keywords: current; drop; figure; pressure; source; voltage
- Vehicle Dynamics Based ABS ECU Testing on a Real-Time HIL Simulator by Enisz, K.; Tóth, P.; Fodor, D.; Kulcsár, T. (2011) - 8): ● state selection (Fig. 9) ● main pressure change check (Fig. 10) ● cycle interval calculation (Fig. 11) ● target pressure calculation (Fig. 12) ● pressure difference calculation (Fig. 13) ● brake pressure calculation (Fig. 14). Keywords: HIL simulation environment, ABS, ECU Introduction The cost efficient ECU testing becomes an important issue. Keywords: abs; calculation; ecu; fig; figure; pressure; wheel
- Tyre Pressure Monitoring with Wavelet-Transform by Tóth, P.; Enisz, K.; Fodor, D. (2011) - /SVE /TUR /UKR /ENU (Use these settings to create Adobe PDF documents best suited for high-quality prepress printing. The first one uses pressure sensors while the second one uses the wheel speed signals of the ESP system on board to make an estimation of the pressure levels of the tyres. Keywords: frequency; pressure; transform; wheel
- New Hybrid Wavelet and CNN-Based Indirect Tire-Pressure Monitoring System for Autonomous Vehicles by Márton, Zoltán; Fodor, Dénes (2020) - The amplitude was al- tered to such a degree of different frequency components that the location of the peaks remained unchanged. Spectral leakage essentially means that frequency components from one bandwidth also appear in the neighboring bandwidths [9]. Keywords: algorithm; cnn; eigenfrequency; fft; frequency; layer; pressure; signal; tire; transform
Algorithm
- CLASSIFICATION NEURAL NETWORKS IMPROVEMENT USING GENETIC ALGORITHMS by Woinaroschy, A.; Plesu, V.; Woinaroschy, K. (2002) - the bounds imposed to the weights of the inter-neuronal connections, the number of neurons in the hidden layer, fitness expression, etc. Keywords: neural networks, genetic algorithms, classification Introduction An important field of neural network applications in bioprocessing and chemical engineering consists in classification problems, like process fault detection and diagnosis, detection and location of gross errors in experimental data sets, spectral analysis, models discrimination and identification of model parameters, etc. There are several types of neural networks used for classification problems: back-propagation, radial-basis function, learning-vector-quantization, probabilistic networks, networks based on adaptive-resonance-theory, and so on. Keywords: algorithm; layer; network; neurons; number; output; procedure; seeding
- Non-Technical Loss Diagnosis in Electrical Networks With a Radial Layout by Pózna, Anna I.; Fodor, Attila; Hangos, Katalin M. (2018) - These illegal loads should be located in single load networks. Illegal load is a load that originates from a fraudulent meter, i.e. the consumer uses illegal power. Keywords: algorithm; currents; detection; difference; load; network; power; subnetworks; voltage
- Evaluation of Resource optimization based on quantum search by Gaily, Sara El (2018) - On the other hand, the variance of the pro- posed quantum solution remained approximately linear and tended to zero, therefore, the quantum system con- serves the distribution uniformity. In order to exploit the power of quantum comput- ing in terms of resource distribution, a quantum extreme value searching algorithm was used [5], which will be *Correspondence: elgaily@hit.bme.hu combined with an appropriately designed classical frame- work. Keywords: algorithm; distribution; number; quantum; units
- Theoretical background and application of multiple goal pursuit trajectory follower by Horváth, Ernő; Pozna, Claudiu; Kőrös, Péter; Hajdu, Csaba; Ballagi, Áron (2020) - dsum = N∑ k=0 ∣∣∣ ∥∥∥−−−→CfGk ∥∥∥−ρf ∣∣∣. (2) Here dsum denotes the total distance for goal point set G. The second section deals with the design strategy of trajectory tracking and defines the problem precisely. Keywords: algorithm; angle; distance; error; goal; points; pursuit; set; steering; trajectory; vehicle
Membrane
- Considerations to Approach Membrane Biofouling in Microbial Fuel Cells by Szakács, Szabolcs; Bakonyi, Péter (2020) - On the one hand, re- duced oxygen transport membranes (OTMs) are likely to maintain the typically less oxygen tolerant, electroactive bacteria located on the surface of the anode in a good con- dition. *1 AND PÉTER BAKONYI1 1Research Institute on Bioengineering, Membrane Technology and Energetics, University of Pannonia, Egyetem u. 10, 8200 Veszprém, HUNGARY Among bioelectrochemical systems, those referred to as microbial fuel cells (MFCs) are widely implemented for wastew- ater management and simultaneous recovery of electrical energy. Keywords: biofouling; doi; fuel; membrane; oxygen
- Nickel and Zinc Removal by Complexation-Ultrafiltration Method by Borbély, G.; Nagy, E. (2008) - pH of polymer ~5 >11 ~11 pH of metal solution 2.1 (Zn2+)* 5.5 (Ni2+)* 2-9 2; 7; 9 Polymer/metal [% ] 2 7 8 9 pH of metal solution Ni Zn Figure 3: Retention of Ni2+ and Zn2+ binding by PEI-25 versus pH of metal solution PEI/Me2+ = 1 mol/mol, PES-10 membrane 20 0 10 20 30 40 50 60 R [% ] 2 7 8 9 pH of metal solution Zn-PAMAM G4.5 Zn-PAMAM G5.0 Ni-PAMAM G4.5 Ni-PAMAM G5.0 Figure 4: Keywords: complexation; membrane; metal; mol; pamam; polymer; solution
- Separation Methods in the Algae Technology by Hodai, Z.; Horváth, G.; Hanák, L.; Bocsi, R. (2012) - The following 40 dm3 of algae suspension was densified according to the procedure given above and coded UF2. During the experiments, the freshly harvested and still reproducing algae mixtures exhibited excellent flocculation and appropriate (average) speed of sedimentation (6×10-3 m/s). Keywords: algae; dm3; experiments; flocculation; membrane; microalgae; permeate; suspension
Table
- Optimisation of the Physical Properties of Rice Husk Ash in Ceramic Materials Using the Response Surface Methodology by Wisdom, Asotah; Mark, Udochukwu; Zeberu, Elakhame; Adeleke, Abraham (2021) - 23–30 (2021) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2021-04 OPTIMISATION OF THE PHYSICAL PROPERTIES OF RICE HUSK ASH IN CERAMIC MATERIALS USING THE RESPONSE SURFACE METHODOLOGY ASOTAH WISDOM*1, UDOCHUKWU MARK1, ELAKHAME ZEBERU2, AND ABRAHAM ADELEKE3 1Department of Metallurgical and Materials Engineering, Federal University of Technology, Owerri, Imo State, NIGERIA 2Federal Institute of Industrial Research Oshodi, Lagos State, NIGERIA 3Department of Materials Science & Engineering, Obafemi Awolowo University, Ile-Ife, NIGERIA Optimisation of the physical properties of rice husk ash (RHA) in ceramic materials was carried out using Response Surface Methodology. 23–30 (2021) 26 WISDOM, MARK, ZEBERU, AND ADELEKE Table 3: EDX data of ceramic samples. Keywords: ceramic; husk; model; rice; table
- Determination of Phosphorous, Suplhur, and Silicon Content of Low-alloyed and Unalloyed Steel by Icp-aes After a Unified Wet Chemical Sample Preparation Procedure by Banhidi, O. (2012) - Regarding the sample preparation methods, most procedures suggested for sample preparation dissolve the steel sample in hydrochloric acid [3]. Although the methods based on dissolution of the solid samples may have several drawbacks – such as much time may be necessary to dissolve the sample, sample losses may occur, or the sample may be contaminated either from the dishware or from the chemicals, etc. –, the methods using wet chemical sample preparation have some definite advantages: almost any kind of sample can be used and normally there is no need to have many special certified reference materials to perform the calibration. Keywords: calibration; preparation; sample; table
- Characterisation of Cements from Dominantly Volcanic Raw Materials of the Carpathian Bend Zone by Halmagyi, Timea; Mosonyi, Emilia; Fazekas, József; Spataru, Maria; Goga, Firuta (2016) - Physical properties of cement samples C1-C5. Physico–mechanical properties of cement samples C1-C5. Keywords: belite; cement; doi; sample; setting; specific; strength; table; volcanic
- PRESENT STATUS AND PERSPECTIVES OF CO-COMBUSTION IN GERMAN POWER PLANTS by Scheurer, W.; Richers, U.; Seifert, H.; Hein, K. R. G. (2002) - Moreover, experience accumulated in German coal fired power plants in using supplementary fuels is compiled. In Germany, various waste materials are used in coal frred power plants among other facilities. Keywords: approx; coal; combustion; dry; fuels; germany; operation; plants; power; sewage; sludge; table; waste; wood
Solution
- LEAST SQUARES AND THE MATRIX RICCATI EQUATION by Storey, C. (2001) - Received: July 26, 2001 There are a number of methods for least squares and total least squares solution of linear equations. When Newton's method is applied to the general AMRE XPX +QX +XF+G::O (4) a linear matrix equation, solutions Xi of which converge to X the solution of Eqn. Keywords: solution
- Krafft-Clear Point Diagrams For Some Sodium 1,4 di-n-Alkylbenzene Sulphonates by Barakat, Y.; Gendy, T.S.; Ibrahim, V.; Mead, A.I. (1997) - A regular decrease in Krafft point is seen in presence of 2 wt.% NaCl. At the same salinity, the effect of alcohol molecular weight, on Krafft point, is illustrated in Fig.3. Keywords: 1,4; krafft; nacl; point; solution; sulphonates
- COMPARISON OF MATHEMATICAL PROGRAMMING AND PINCH-BASED TECHNIQUES FOR MASS EXCHANGE NETWORK SYNTHESIS by Szitkai , Z.; Msiza , A. K.; Fraser , D. M.; Rév, E.; Lelkes , Z.; Fonyó , Z. (2002) - After dealing with practical problems of the mathematical programming methods, the last part of this paper presents MINLP solutions for thirteen example problems solved with pinch methodology by Hallale In this section MINLP solutions for most of the MENS example problems of the thesis of Hallale [7] are presented. Keywords: capital; cost; design; example; mass; method; minlp; pinch; problem; solution
Method
- Cumulative Lopa Method by Baradits sr., Gy.; Madár, J. (2009) - Cumulative LOPA method SW: the Tool4S There are several software tools for making HAZOP and LOPA, but our experience has showed that most of them only can calculate the RRF value for a scenario (per scenario method) but do not accumulate them. Conclusions In this article, we evaluated the existing methods which calculate the SIL value of SIFs within a HAZOP study using LOPA method. Keywords: frequency; lopa; method; risk; safety; scenario
Carbon
- Mechanical Properties of Polypropylene/Multi Walled Carbon Nanotube Composites by Szentes, A.; Horváth, G.; Varga, Cs. (2010) - wt% multi walled carbon nanotubes (MWCTN). Keywords: carbon nanotubes, polypropilene, composites, mechanical properties Introduction Carbon nanotubes (CNTs) were discovered in the soot of arch discharge by Sumio Iijima in 1991 Keywords: black; carbon; composites; extruder; mwcnt; screw; screw extruder
Waste
- Preliminary Study of Cesium Immobilization in a Geopolymer Matrix by Kocsis, Erika; Fehérvári, Máté; Novák, Máté; Tóth-Bodrogi, Edit; Kovács, Tibor (2023) - Mixing ratio of the used materials Experiment Used materials Mixing ratio I. Zeolites – Cement 1:1 Zeolites – Bentonite – Cement 1:1:1 Zeolites – Kaolinite – Cement 1:1:1 Bentonite – Cement 1:1 Bentonite – Kaolinite – Cement 1:1:1 Kaolinite – Cement 1:1 II. Cement matrices consisting of zeolites mixed in different ratios were measured and the CFL values obtained can be seen in Figure 3. Keywords: bentonite; cement; cesium; cs-137; doi; materials; mud; waste; zeolites
- Investigation of Regional Differences in the Organic Fraction of Municipal Solid Waste in Hungary by Tóth, Eliza; Bobek-Nagy, Janka; Kurdi, Róbert (2023) - The directly landfilled organic fraction of municipal solid waste (OFMSW) offers a lot of potential with regard to energy recovery or as a soil substrate. Intermediate pyrolysis of organic fraction of municipal solid waste and rheological study of the pyrolysis oil for potential use as bio- bitumen, J. Clean. Keywords: diameter; fraction; marcali; ofmsw; plastic; pécs; waste
- Towards a Circular Economy – Changing Needs and Solutions for Waste Management Systems by Sarkady, Attila; Egedy, Attila; Kurdi, Róbert ; Tóth, Eliza (2024) - Another closely related objective of this study is to introduce new waste management technologies for these two main waste streams in order to determine whether the goals set in accordance with regulations can be reached by applying existing practices and equipment. Predictions are also made concerning upcoming trends in and the future of waste management. Keywords: changes; council; directive; economy; european; management; materials; mbt; sorting; technologies; waste
- A Study of the Adsorption Characteristics of Cobalt and Caesium from a Solution by Using Vietnamese Bentonite by Cuong, Le Phuoc; Giang, Pham Hoang; Hanh, Bui Dang; Bátor, Gergő (2015) - In the presence of EDTA in radioactive waste solution, radioactive isotopes could not be adsorbed onto VNB due to forming stronger complexes with EDTA We are planntng to scale up the UV system to include the optimisation of pH values and the effect of ammonium converted from EDTA in order to apply these findings to radioactive solution waste on a large scale. Keywords: adsorption; bentonite; co(ii; dm-3; vnb; waste
Voltage
- Estimation of the Maximum Applicable Voltage Level of Aluminium Electrolytic Capacitors by Automated Spark-Detection Measurement by Kovács, L.; Fodor, D. (2011) - Developing Process of Capacitor Development of aluminium electrolyte capacitors is a complex process. The graphical interfaces of electrolyte measurements have two pages. Keywords: aluminium; capacitor; current; electrolyte; foil; leakage; measurement; spark; voltage
- Parameter Sensitivity Analysis of an Induction Motor by Hatos, P.; Fodor, A.; Magyar, A. (2011) - Keywords: induction machine, dynamic state space model, parameter sensitivity analysis Introduction The induction motors are the most commonly used electrical rotating machines in several industrial applications including the automotive industry, too. The mechanical energy Pmech(t) of the system can be defined as: (2.17) where the mechanical energy Wmech(t) in case of rotating motor can be given by: (2.18) Keywords: inductance; induction; induction motor; model; motor; parameter; stator; voltage
State
- A Comparison of Advanced Non-linear State Estimation Techniques for Ground Vehicles by Max, György; Lantos, Béla (2014) - The aim is to produce invariant frames and invariant output errors to transform a locally asymptotically convergent observer around an equilibrium point into an invariant one, retaining its first-order approximation. The following statements are valid: • (x̂,u, y)→ E(x̂,u, y) invariant output error exists, • there is a (x̂,u)→ I(x̂,u)∈ℝn+m&r invariant function, • every other invariant output error has the form of ! Keywords: estimation; k|k−1; observer; sigma; state
- EFFECT OF STEADY STATE ASSUMPTION ON THE STRUCTURAL SOLVABILITY OF DYNAMIC PROCESS MODELS by Leitold, A.; Hangos, K. M. (2002) - Keywords: process models, DAE models, differential index, solvability, structural analysis, steady state assumption Introduction Lumped process models are in the form of differential algebraic equations which are sometimes difficult to solve numerically due to index and stiffness problems. to elllighten the importance and significance of analyzmg the solvability properties of process models and the effect of modelling thereon we should recaJJ ~at modelling is one of the key and most labour..consumm.g activity in process system engineering serving as a b~sts for process flowsheeting, process control, fault detection and diagnosis. Keywords: differential; graph; index; model; representation; state; type; variable
Activity
- Development of a Natural Cream Additive Containing an Extract of Aronia Melanocarpa Berries and a Probiotic to Inhibit Microbial Development and Increase Solar Protection by Saglam, Ali; Asan-Ozusaglam, Meltem (2025) - [55] Lohan, S.B.; Lauer, A.-C.; Arndt, S.; Friedrich, A.; Tscherch, K.; Haag, S.F.; Darvin, M.E.; Vollert, H.; Kleemann, A.; Gersonde, I.; Growth, N.; Lademann, J.; Rohn, S.; Meinke, M.C.: Determination of the antioxidant status of the skin by in vivo-electron paramagnetic resonance (EPR) spectroscopy, Cosmetics, 2015, 2(3), 286–301, DOI: 10.3390/cosmetics2030286 [56] Lazaro, J. L.; Izzo, V.; Meaume, S.; Davies, A. H.; Lobmann, R.; Uccioli, L.: Elevated levels of matrix metalloproteinases and chronic wound healing: an updated review of clinical evidence, J. Wound Care, 2016, 25(5), 277–287, DOI: 10.12968/jowc.2016.25.5.277 17–25 (2025) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2025-03 DEVELOPMENT OF A NATURAL CREAM ADDITIVE CONTAINING AN EXTRACT OF ARONIA MELANOCARPA BERRIES AND A PROBIOTIC TO INHIBIT MICROBIAL DEVELOPMENT AND INCREASE SOLAR PROTECTION ALI SAGLAM1 AND MELTEM ASAN-OZUSAGLAM1* 1 Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Aksaray University, Bahçesaray District, Aksaray, 68100, TURKEY Natural products have been used in cosmetics for centuries for skincare purposes. Keywords: abee; activity; antimicrobial; aronia; atcc; aureus; cream; doi; ethanol; extract; melanocarpa; microorganisms; skin; test
- Investigation of Satureja Hortensis L. as a Possible Source of Natural Antioxidants by Gontaru, L.; Plánder, S.; Simándi, B. (2008) - Influence of the milling on the yield and antioxidant activity of different extracts of savory 2 is represented in Table 3. Table 3: Extraction Yield and antioxidant activity of different extracts of savory 2 with and without milling aYield (%) aIC 50% µg/ml S with milling without milling with milling without milling 1 26.91 ± 0.50 25.36 ± 1.07 35 ± 0.1 24 ± 0.1 2 25.77 ± 0.35 18.67 ± 0.90 60± 0.1 53 ± 0.7 3 11.48 ± 0.54 8.48 ± 0.44 90 ± 0.2 80 ± 0.3 aMean value of three measurements ± SD (standard deviation) S - solvent; 1: ethanol 96%; 2: ethanol 100%; 3: ethyl acetate. Keywords: activity; antioxidant; ethanol; extraction; savory
- Immobilized Enzymes Availability for Glycerol – 1,3 Propanediol Bioconversion by Balassy, A.; Németh, Á.; Sevella, B. (2009) - Keywords: Glycerol; 1,3-propanediol; enzyme activities; immobilization Introduction As glycerol is a nontoxic, edible, biodegradable compound, it will provide important environmental benefits to platform products. Enzyme activities and protein concentrations from Run 3 are shown in Fig. Keywords: activity; enzyme; fermentation; glycerol; g·l-1; immobilization; pdor; propanediol
- Cellulase and hemicellulase enzymes as single molecular nanobiocomposites by Hegedüs, I.; Nagy, E.; Kukolya, J.; Barna, T.; Fekete, Cs. A. (2011) - Table 1: Yields of enzyme nanoparticles of thermostable hemocellulase enzymes (from Thermobifida fusca) using method by Kim et al. Type of enzymes β-mannosidase Mutant β-mannosidase β-xylosidase Endomannanase Sign MN–12 MM–2 XI–6 EM–4 Amount [mg] and yield (η) of enzyme nanoparticles 0.525 (η = 3.50%) 0.782 (η = 4.01%) 3.712 (η = 12.37%) 0.280 (η = 4.15%) 345 Table 2: Comparison of the yields of enzyme nanoparticles using two methods Methods Kim et al. (3 step process) Keywords: activity; cellulase; ee ee; enzyme; layer; mannosidase; nanoparticles
- Production of the Enzyme Cyclodextrin Glycosyltransferase Using Different Fermentation Techniques by Czinkóczky, Réka; Németh, Áron (2019) - Enzymes for carbohydrate engineering (Progress in Biotechnology) 1996 12 23–41 (Else- vier, Amsterdam, The Netherlands) ISBN: 978-0-444- 82408-0 DOI: 10.1016/S0921-0423(96)80360-1 [3] van der Veen, B. A.; van Alebeek, G.-J. W. M.; Uitdehaag, J. C. M.; Dijkstra, B. W.; Dijkhuizen, L.: The three transglycosylation reactions catalyzed by cyclodextrin glycosyltransferase from Bacillus circulans (strain 251) proceed via different kinetic mechanisms Eur. [21] Uitdehaag, J. C. M.; Kalk, K. H.; van der Veen, B. A.; Dijkhuizen, L.; Dijkstra, B. W.: The cycliza- tion mechanism of cyclodextrin glycosyltransferase (CGTase) as revealed by a γ-cyclodextrin-CGTase complex at 1.8-Å resolution J. Biol. Keywords: activity; bacillus; batch; cgtase; cyclodextrin; doi; enzyme; fermentation; growth
Power
- Optimization Problems of Fermentor Aeration-Agitation System by Kozma, L.; Nyeste, L.; Szentirmai, A. (2006) - Consequently, the optimization of agitation system is a very important factor but it is only partially provided by scale-up using pilot plant data and similarity criteria. Newer Complex Agitation Sysems Merely the last few decades the researchers and manufacturers have realized that the efficiency if agitation systems can be increased by development of complex systems including more agitators of different types and properties which satisfy better the requirements of the particular levels. Keywords: agitation; air; fermentation; oxygen; power; scale; systems; transfer
- Examination of fuel consumption factors, basics of precision and on-board diagnostic measurements by Busznyák, Tibor; Lakatos, István (2020) - In statistical works, fuel consumption data require that the energy consumption of vehicles be analyzed correctly. Can a connection between elevation data from global positioning and fuel consumption data from on-board diagnostics at a constant or various speeds be identified? Keywords: consumption; fuel; power; resistance; vehicle; velocity
Values
- REFRACTIVE INDICES, DENSITIES AND DERIVED EXCESS PROPERTIES OF BINARY AND TERNARY SYSTEMS WITH DIMETHYL SULFOXIDE, WATER AND 1,4-DIOXANE by Omota, L. M.; Iulian, O.; Mateescu, c. (2001) - The experimental uncertainties are: o(XJ = 0.0001, a(p)lkg n{' = 0.2 and o(VSJ!l0-9m3mor1 = 10. 2 Table 1 Densities and refractive indices of pure components at 298.15 K p , w-3-kg m·3 Compound exptl Literature 0.99704&,9 0.9971 Water 0.9970510 1.0957 1.095378 DMSO 1.0954712 1.0281 1.027978 1,4-dioxane 1.0280213 1.0278314,15 exptl 1.3325 1.4768 1.4198 nv literature 1.3324-'>·11 1.33146 1.33258 1.476812 1.47695 1.47758 1.41945 Table 2 Densities, excess molar volumes and excess partial molar volumes. 0.0033 0.0000 Tables 2 and 3 list the measured densities ( p ) and refractive indices ( n0 ) together with the calculated values of excess molar volumes ( yE ), excess partial -£-£ molar volumes of the components ( V, , V 2 ) and, respectively. Keywords: 1,4; binary; dioxane; indices; mixing; molar; refraction; systems; values; volumes
- POLYMER-PLASTICIZER INTERACTIONS: COMPARISON OF EXPERIMENTAL DATA WITH THEORETICAL RESULTS by Orbán, Á.; Zelkó, R.; Dredán, J.; Marton, S.; Rácz, I. (2001) - The results indicate that the calculation of molar refraction values of polymer dispersions containing plasticizer offers useful means for the determination of the optimum concentration of the selected plasticizer. Calculation of the Molar Refraction by the Lorenz Lorenz Equation The following equation was used for the determination of molar refraction values (R): (1) where n is the determined refractive index, M is the molecular weight and d is the density of the examined material [8]. Keywords: dispersions; eudragit; film; plasticizer; polymer; refraction; values
- Tool Life of Cutting Tool in Case of Hard Turning by Ráczkövi, L. (2010) - This equation is called the simple Taylor equation, differentiated from its later, improved version, which also reflects the effect feed-rate and the depth of cut plays on tool life. The experiments designed to determine tool life were accomplished using PCBN tool with different cutting speeds and values of federating and depth of cutting. Keywords: cutting; life; speed; tool; values
Current
- Application of the Remote Earth Potential in Cathodic Protection Measurements by Lukacs, Z. (2012) - As follows from Eq. 7, the slope of this linear relationship gives the difference of the remote earth ON and OFF potentials and the intercept gives the remote earth OFF potential. Table 1: Comparison of measured and calculated values of remote earth potentials Parameter Measured /V Calculated from Eq. Keywords: cathodic; coating; current; defect; potential
- Determination of the Inductance of Starter Relays by Nagy, L.; Lénárt, J.; Jakab, E. (2011) - [m H ] Figure 4: Inductance functions 0 10 20 30 40 0 5 10 15 0 2 4 6 8 10 i The electro-dynamic modelling of the mechanism requires inductance of the relay and its derivative depending on the position of the iron core. Keywords: coil; core; current; inductance; iron; iron core; measurement
Enzyme
- Comparison of the Structure and the Stability of Single Enzyme Nanoparticles by Hegedüs, I.; Nagy, E. (2009) - The first step is a modification of CK enzyme complex and its solubilization in a hydrophobic medium. In the case of CK enzyme complex during the solvatation process in hexane enzyme particles with size higher than 10 nm can not be detected. Keywords: aot; aot aot; complex; ee ee; enzyme; layer; nanoparticles; polymer; sen
Corrosion
- COMPARATIVE STUDY AND MODELLING OF RUTIN EXTRACTION FROM HYPERICI HERBA AND HIPPOPHAES FRUCTUS by Galaction, A. I. ; Cascaval, D. (2002) - The study on Rutin extraction from autochthonous Hyperici herba andHippophaesfructus with methanol, ethanol and! propanol at different concentrations, temperatures and duration indicated that the most efficient solvent is ! For both extraction systems, the considered variables control the extraction process in a 99.2-99.5% extent, the solvent concentration exhibiting the most imp01tant influence, especially for Rutin extraction from Hippophaes fructus. Keywords: extraction; fructus; herba; hyperici; rutin; rutin extraction; solvent
- Solid-liquid Extraction of Chlorophyll from Microalgae from Photoautotroph Open-air Cultivation by Molnár, Éva; Rippel-Pethő, Dóra; Bocsi, Róbert (2021) - In the Figure 2: Changes in chlorophyll concentration during the Soxhlet measurements Figure 3: The efficiency of chlorophyll extraction of the various solvents during Soxhlet extraction Figure 4: Change in chlorophyll concentration as a function of mass during leaching Figure 5: Efficiency of leaching using the various solvents 122 experiments conducted with acetone, it was observed that the extraction efficiency of chlorophyll a or chlorophyll b is greatly dependent on the conditions. Knowing the mass and water content of the algae, the efficiency of chlorophyll extraction relative to the mass of the dry algae can be calculated. Keywords: algae; chlorophyll; extraction; methanol; solvent; soxhlet
- Multi-Elemental Inductively Coupled Plasma-Optical Emission Spectroscopic Calibration Problems of the Sequential Extraction Procedure for the Fractionation of the Heavy Metal Content from Aquatic Sediments by Heltai, György; Fekete, Ilona; Halász, Gábor; Kovács, Katalin; Horváth, Márk; Takács, Anita; Boros, Norbert; Győri, Zoltán (2015) - For the characterisation of the environmental mobility of heavy metal contamination in aquatic sediments, the EU Bureau of Reference has proposed a fractionation by sequential extraction procedure. In Chemical speciation in the environment, Eds.: Ure, A.M.; Davidson, C.M. (Blackie Academic and Professional, London, U.K.) 1995, pp. 237- 275 [5] Tessier, A.; Campbell, P.G.C.; Bisson, M.: Sequential extraction procedure for the speciation of particulate trace metals, Anal. Keywords: bcr; calibration; extraction; metal; procedure; sediments; step
Mass
- Efficiency and Mass Optimization of Electric Permanent Magnet Motor Driven Vehicle by Polák, J. (2011) - Efficiency of drivetrain depends on the transmission and motor efficiency: ηhl = f 317-320 (2011) EFFICIENCY AND MASS OPTIMIZATION OF ELECTRIC PERMANENT MAGNET MOTOR DRIVEN VEHICLE J. POLÁK Széchenyi István University, Department of Automotive and Railway Engineering H9026 Győr, Egyetem square 1, HUNGARY E-mail: polakj@sze.hu The propulsion system of road vehicles could be realized with the use of electric motor and a transmission system. Keywords: drive; drivetrain; efficiency; electric; mass; motor; transmission; vehicle
- Phosphoglycolipid Profiling of Bacterial Endotoxins by Kilár, Anikó; Dörnyei, Ágnes; Sándor, Viktor; Kilár, Ferenc; Kocsis, Béla (2018) - 7-11 (2018) Introduction Experimental Chemicals and Reagents Bacterial strains and lipid A isolation Liquid Chromatography – Mass Spectrometry Measurements Results and Analysis HPLC-MS of bacterial lipid A Tandem mass spectrometric analysis of lipid A species Discussion Conclusion Gram-negative bacterial lipid A analysis by negative electrospray ion trap mass spectrometry: Keywords: mass
Fermentation
- Sweet Sorghum Juice and Bagasse as a Possible Feedstock for Bioethanol Production by Gyalai-Korpos, M.; Feczák, J.; Réczey, K. (2008) - Two different carbon sources were investigated: - Enzymatic hydrolysates of sweet sorghum bagasse pretreated in different ways. In 2007 4.92 billion liters of ethanol were produced from sweet sorghum juice in China and India. Keywords: bagasse; content; ethanol; fermentation; hydrolysis; koh; naoh; sorghum
- Effects of Pan Bread Making on Zearalenone Levels in Artificial Contaminated Wheat Flour by El-Desouky, T.A.; May Amer, M.; Naguib, K. (2012) - After mixed directly 23.26 ±0.34 46.98 ±0.4 73.71 ±0.12 96.45 ±0.17 30 13.71 ±0.46 24.18 ±0.25 43.88 ±0.52 71.43 ±0.39 45 9.44 ±0.18 19.22 ±0.44 37.6 ±0.41 63.16 ±0.51 Table 2: Concentrations of ZEA determine in artificially contaminated wheat flour after dough fermentation at 30°C (n=3) Spiking level of ZEA (µg/kg) Time of fermentation dough(min) 25 50 75 100 After mixed directly 23.26 ±0.34 46.98± 0.4 73.71 ±0.12 96.45± 0.17 30 10.3 ±0.26 22.45± 0.28 39.76 ±0.71 65.58± 0.73 45 7.52 ±0.1 17.14± 0.19 34.19 ±0.38 60.38± 0.92 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 25 50 75 100 Concentration of ZEA in artificially wheat flour (µg/kg) R ed uc tio n of Z E A (% ) fermentation at 30ºC for 30min fermentation at 30ºC for 45min fermentation at 25ºC for 30min fermentation at 25ºC for 45min Figure 1: The percentages of ZEA reduction during fermented dough Effect of baking ZEA concentration as affected by baking of artificially contaminated flour dough during Pan bread making is shown in Table 3 and Figure 2. The percentage of ZEA reduction increased with time of fermentation dough shown in (Figure 1). Keywords: cell; dough; fermentation; flour; min; zea; zearalenone
- POSSIBLE SUBSTRATES FOR ACETONE–BUTANOL AND ETHANOL FERMENTATION BASED ON ORGANIC BY-PRODUCTS by Varga, E.; Kádár, Z.; Schuster, K. C.; Gapes, J. R.; Szengyel, Z.; Réczey, K. (2002) - Their conversion values are low~ therefore they cannot be recommended as ABE fermentation substrates based on these results despite their potentially high carbohydrate contents. Reducing sugar concentrations of enzymatic hydrolysates starting from substrates at varied dry matter contents -Sugar concentration Keywords: abe; apple; conversion; experiments; fermentation; fruit; hydrolysis; medium; products; pulp; residues; sugar
Network
- OPTIMIZATION OF PIPELINE NETWORK FOR OIL TRANSPORT by Jokić, A.; Zavargó, Z. (2001) - for pipe network sections j index. for pipe network paths lc number of sections in a given path L node height, m L~ equivalent height, m Table 7 Keywords: k;x; network; pipe; section
- CBN Tool Life Prediction by Artificial Neural Network by Raczkovi, L. (2011) - [4]: ∑= +++++ −= m i k i k ij k j k j k j waa 1 22111 )1( δδ (8) Determining tool life by Artifical Neural Network In this paper the experimental data set given in [5,6] is used to design a neural network model which predicts tool life according to given range of feed rate, depth of cut, workpiece diameter and cutting speed. Keywords: Tool life, Artifical Neural Network Introduction Cubic boron-nitride was synthesized by R. H. Wentorf in 1957. Keywords: cutting; layer; life; network; tool
Design
- Weight Reduction of a Drone Using Generative Design by Seregi, Bálint Leon; Ficzere, Péter (2022) - Keywords: generative design, additive manufacturing, weight reduction 1. [3] To demonstrate the reduction in weight as a result of generative design, a small-scale drone frame was opti- mized. Keywords: battery; design; frame; manufacturing; reduction; weight
- Magnetorheological Fluid Brake – Basic Performances Testing with Magnetic Field Efficiency Improvement Proposal by Poznić, A.; Zelić, A.; Szabó, L. (2012) - A lot of work was done on MR fluid brakes modelling, properties investigation and control [3, 6, 11]. MR fluid brakes have also been used in actuators due to their distinguished force control and power transmission features [5, 15]. Keywords: brake; design; disk; field; fluid; mr brake; rotor; speed; torque; types
Function
- Probability and Expected Time of Emptying of Intermediate Storages under Stochastic Operation by Orbán-Mihálykó, É.; Lakatos, B. G.; Mihálykó, Cs.; Lucz, L. (2009) - Figure 2: The form of function φ(x,δ) depending on the initial amount of material x and parameter δ Fig. Figure 7: The probability of emptying storage ψ(x) as a function of initial amount of material In Fig. Keywords: function; material; storage
- Models and Methods to Detect Similarity of Manufacturing Machines by Hornyák, O.; Sáfrány, G. (2010) - Group technology for automated generation of machine controller code. 2 refers to the process in which new manufacture machine controller software can be automatically generated. Keywords: code; controller; function; group; machines; manufacturing; project; software; ⎢ ⎢; ⎥ ⎥
Effect
- Superstructure Stabilization of Ballast Bedded Railway Tracks with Geogrids by Fischer, Sz.; Horvát, F. (2011) - Interlocking effect and load bearing of a reinforced ballast (modified from Konietzky, et al., 2004) Goal of the research work The research team investigates the stabilization effect of geogrid layers under railway ballast using three methods: – constructing trial field track sections where the track geometry position and its changes are regularly measured, – setting up laboratory tests which are adequate for determining parameters related to ballast material- geogrid interaction, – computer-aided modelling for improving and generalizing the relationships. The changing of interlocking effect in the ballast material as a function of vertical distance from geogrid layer is a key-role for the conformability of evaluation of geogrid 103 reinforcement’s use. Keywords: ballast; effect; geogrid; layer; n.a; railway; reinforcement; research; shear; tests; track; type
Industry
Size
- S-Polarized Light-Induced UV–Vis Plasmonics in Al–Ag Dimers: A Theoretical Perspective by Devika, Raju; Satheesh, Aiswarya; Augustine, Pearl; Parameswaran, Manoj; Radhakrishnan, Ranjini (2025) - Theoretical studies show that Al stands out as one of the rare metals capable of achieving plasmonic resonance across a wide spectral range from near-ultraviolet to visible simply by adjusting the particle size and interparticle distance. Al exhibits shorter plasmonic resonance wavelengths due to its distinct properties compared to those of silver. Keywords: dimer; gap; plasmonic; radius; resonance; size
- Mathematical Models for a Closed-Circuit Grinding by Kis, P. B.; Mihálykó, Cs.; Lakatos, B. G. (2009) - If I denotes the total number of size fractions of particles and we introduce the notation hx = (xmax – xmin)/I, then xi = xmin + ihx stands for the ith particle size fraction. Therefore the greater value of the parameter c yields smaller mean particle size and dispersion of the particle size distribution. Keywords: cut; grinding; mill; model; particles; size
- Impact of Size Heterogeneity of Core-Shell Packing Materials on Chromatographic Separation of Large Biomolecules by Lukács, Diána; Horváth, Krisztián (2014) - The results showed that the affect of particle size distribution was the highest in case of fully porous phases, and it decreased as the diameter of the inner core decreased. In literature, fairly contradictory information can be found about the effect of particle size distribution, PSD, on the separation efficiency. Keywords: core; efficiency; particle; separation; shell; size
- Crystallization of para-Xylene in a Batch Cooling Crystallizer by Borsos, A.; Lakatos, B. G. (2011) - The differences between the processes of crystal mean sizes obtained by Table 4: Kinetic parameters used in simulation kg0=16.25 ms-1 g=4.74 kv=0.52 b=0.71 kb0=345.59 #m-3s-1 ρh=1000 kg m-3 ρc=1100 kg m-3 ρsv=1000 kg m-3 Eg=370.23 J mol-1 Eb=-63.37 J mol-1 using the original parameters listed in Table 3 and those in Table 4 are shown in Fig. PhD Thesis, University of Veszprém, Veszprém (2002) 10. Á. BORSOS, B. G. LAKATOS: Modelling of crystal size distribution in batch cooling crystallizer (in Hungarian); Proceedings of Conference Chemical Engineering Days, Veszprém (2011) 11. Keywords: balance; crystallization; crystallizer; crystals; equations; fig; model; moment; population; size; xylene
- Replacement of Biased Estimators with Unbiased Ones in the Case of Student's T-Distribution and Geary’S Kurtosis by Tóth, Gergely; Szepesváry, Pál (2017) - Finally, some remarks are made on statistical tests based on sample-size dependent values in order to ex- tend their applicability to small sample sizes. The performance of the last three tests was rather weak for small sample sizes, whereof one cause might be the lack of correction for small sample sizes even for normally distributed data. Keywords: distribution; kurtosis; sample; size; student
- Comparison of Particle Size Distribution Models for Polymer Swelling by Wirnhardt, Ádám; Varga, Tamás (2018) - By examining the correlation of model parameters in these eleven models, one model called Jaky exhibited a correlation as shown in Fig. Bayat et al. collected PSD models from the last sev- enty years Keywords: beads; distribution; models; polymer; size; swelling
Heat
- A NOVEL METHOD FOR ISOLATION OF LIPOXYGENASE-1 ISOENZYME FROM SOYBEAN MEAL by Németh, Á. S.; Szajáni, B.; Márczy, J. S.; Simon, M. L. (2001) - The essential step of the procedure is the selective heat treatment of soybean meal extract at 70 C in a medium of 0.05 ionic strength and pH 5.2 for 5 min. Ion Exchange Chromatography Anion exchange chromatography of heat treated soybean meal extract was performed according to Axelrod et al. Keywords: heat; lox-1; meal; soybean
Liquid
- Study of Open–looped Simulated Moving Bed (SMB) Chromatographic Process by Nagy, M.; Molnár, Z.; Hanák, L.; Argyelán, J.; Szánya, T.; Ravasz, B.; Turza, G.; Aranyi, A.; Temesvári, K. (2004) - The function of segment III is to separate steroid A and B and to produce steroid B in the LROUT flow. Results of the RG 1040 GSMB 8/46 measurement compared to preparative HPLC measurement Preparative HPLC RG1040 SMB8/46 measurement (9 min) Purity of raffinate (LROUT 2) >99.9 % m/m B >99.9 % m/m B Yield (LROUT 2) ~ 95 % B >92.6 % B Productivity (LROUT 2) 0.303 mingelsilicag Bmg 2.14 mingelsilicag Bmg Eluent consumption (LROUT 2) 0.354 Bmg eluentfreshcm3 0.134 Bmg eluentfreshcm3 21 SYMBOLS qAcetone adsorbent concentration of acetone, mg g-1 aAcetone Langmuir constant of acetone, cm3 liquid free volume g-1 silica gel bAcetone Langmuir constant of acetone, cm3 liquid free volume mg-1 acetone cAcetone concentration of acetone, g dm-3 qB adsorbent concentration of steroid B, mg g-1 aB Langmuir constant of steroid B, cm3 liquid free volume g-1 silica gel bB Langmuir constant of steroid B, cm3 liquid free volume mg-1 B component cB concentration of steroid B, g dm-3 qA adsorbent concentration of steroid A, mg g-1 aA Langmuir constant of steroid A, cm3 liquid free volume g-1 silica gel bA Langmuir constant of steroid A, cm3 liquid free volume mg-1 A component cA concentration of steroid A, g dm-3 k number of components k’ Keywords: acetone; cm3; column; liquid; min; smb; steroid
Separation
- Environmental Significance and Identification of Metal-Chelate Complexes Using Ion Chromatography by Tófalvi, R.; Sepsey, A.; Horváth, K.; Hajós, P. (2011) - The aim of this work is the optimization of a simultaneous chromatographic separation and identification of metal ions complexed by the ligand EDTA or DCTA. The presence of inorganic pollutants, especially toxic metal ions, is a serious issue, as metal ions may often be carcinogenic in nature. Keywords: anions; chromatography; complexes; edta; eluent; ion; metal; retention; separation
- Silica Monolithic Capillary Columns for Hilic Separations by Moravcová, Dana; Planeta, Josef (2018) - The MEDSA column also exhibits Hungarian Journal of Industry and Chemistry SILICA MONOLITHIC CAPILLARY COLUMNS FOR HILIC SEPARATIONS 41 Figure 2: Separation of nucleosides and nucleotides on prepared MEDSA (A), MEPC (B) and bare silica (C) monolithic columns. REFERENCES [1] Nakanishi, K., Soga, N.: Phase separation in silica sol-gel system containing polyacrylic acid I. Gel formation behavior and effect of solvent compo- sition, J. Non-Cryst. Keywords: column; fig; separation; silica
- Separation by Ion Exchange and Adsorption Parametric Pumping IV. by Hanák, L.; Szánya, T.; Szolcsányi, P. (2004) - − The slope and the temperature dependence of ion exchange equilibrium isotherm, which are taken into account with the temperature dependence of ion exchange selectivity coefficients; these are the function of ion exchange resin quality and the ions to be separated, of the solution total concentration and of the applied temperature values. − The ratio of selectivity coefficients, formed on ion exchange on two temperature values (Figure 2.); 1.E-10 1.E-08 1.E-06 1.E-04 1.E-02 1.E+00 0 5 10 15 20 25 30 Cycle number C ol d re se rv oi r, X i 1 4 1 2 1 1.5 1 1.2 1 1.1 Ti/j,C Ti/j,H Co=1.0equ/dm3 Xi,o=0.5 1.E-10 1.E-08 1.E-06 1.E-04 1.E-02 1.E+00 0 5 10 15 20 25 30 Cycle number H ot re se rv oi r, X j Figure 2. Keywords: cycle; equilibrium; exchange; ion; number; separation
Adsorption
- Adsorption of Nickel Ions from Petroleum Wastewater onto Calcined Kaolin Clay: Isotherm, Kinetic and Thermodynamic Studies by Jock, Alexander Asanja; Okon, Anietie Ndarake; Offor, Uchechukwu Herbert; Thomas, Festus; Agbanaje, Edmond Okwudilichukwu (2020) - The removal of nickel ions onto calcined kaolin clay using a batch adsorption technique was conducted. The study yielded a removal efficiency of 89.89% for nickel ions at 25 ◦C. The adsorption process appeared to follow a Freundlich isotherm and pseudo-second order kinetics were found to be in good agreement with the experimental data. Keywords: adsorbent; adsorption; clay; ions; kaolin; kinetics; nickel
- Oxidized Mangosteen Peel-Derived Hydrochar for the Removal of Methylene Blue by Kamalanathan, Subodhan; Amran, Fadina; Zaini, Muhammad Abbas Ahmad (2025) - The rate of methylene blue adsorption by HC and APS at dye concentrations of (a) 5, (b) 10 and (c) 20 mg/L 0 1 2 3 4 0 400 800 1200 1600 A d so rp ti o n c ap ac it y, Q t (m g/ g) time, t (min) Exp HC Exp APS 0 2 4 6 8 0 400 800 1200 1600 A d so rp ti o n c ap ac it y, Q t (m g/ g) time, t (min) Exp HC Exp APS 0 4 8 12 16 0 400 800 1200 1600 A d so rp ti o n c ap ac it y, Q t (m g/ g) time, t (min) Exp HC Exp APS Figure 4: Equilibrium curves of methylene blue adsorption onto hydrochars OXIDIZED MANGOSTEEN PEEL-DERIVED HYDROCHAR 53(1) pp. The rate of dye adsorption onto HC and APS is shown in Figure 5. Keywords: adsorbents; adsorption; aps; blue; doi; dye; hydrochar; mangosteen; methylene
- Adsorption and Intercalation of Small Molecules on Kaolinite from Molecular Modelling Studies by Táborosi, Attila; Kurdi, Róbert; Szilágyi, Róbert K. (2014) - Comparison of the urea (Fig.5) and ethylene Figure 3: Computational models for urea absorption at O- (A) and T-layers in geminal (B) and vicinal (C) arrangements Figure 5: Computational models for the adsorption of ethylene glycol at the (A) O- and (B) T-sheets Figure 4: Computational model for intercalation of urea in kaolinite 22 glycol (Fig.6) intercalated models, the network of interactions between the layers and reagents parallel well the different experimental basal spacing (10.7 vs. 9.5 Å, respectively). When water Figure 7: Computational models for the adsorption of potassium acetate on (A) O- and (B) T-sheets Figure 6: Computational model for ethylene glycol intercalation in kaolinite Figure 8: Computational models for potassium acetate intercalation in the (A) absence and (B) presence of solvent water 23 is present, it is likely to solvate the negatively charged end of the acetate ion with a characteristic -COO-…H- OH distance of 1.63 Å. Keywords: acetate; adsorption; intercalation; kaolinite; models; sheet; urea
Test
- Assessment of the Ecotoxicity of Nanoplastics by Kováts, Nóra; Eck-Varanka, Bettina; Békéssy, Zsófia; Diósi, Dorina; Hubai, Katalin; Korponai, János (2019) - Saf. 2014, 102, 48–54 DOI: 10.1016/j.ecoenv.2014.01.003 [25] Booth, A.M.; Hansen, B.H.; Frenzel, M.; Johnsen, H.; Altin, D.: Uptake and Toxicity of Methylmethacrylate-Based Nanoplastic Particles in Aquatic Organisms, Environ. 2014, 468–469, 1–11 DOI: 10.1016/j.scitotenv.2013.08.028 [19] Abbas, M.; Adil, M.; Ehtisham-ul-Haque, S.; Mu- nir, B.; Yameen, B.; Ghaffar, A. et al.: Keywords: doi; effects; environ; fischeri; food; nanoplastics; particles; sample; test; vibrio
Air
- Analysis of Formed Chips in the Case of Turning Different Polymer Materials by Sarankó, Ádám; Kalácska, Gábor; Keresztes, Róbert Zsolt (2022) - Our goal was to determine turning input parameters where chip formation is favourable or continuous chips do not cause any problems. Keywords: chip formation, polymer materials, turning 1. Keywords: air; chips; pet; pom
- Study of Traffic-Related Urban PM Pollution at Different Locations by Csom, V.; Szentmarjay, T.; Kovács, J.; Domokos, E. (2010) - Increased PM2.5 concentrations increase the risk of emergency hospital admissions for cardiovascular and respiratory causes; and PM10 affects respiratory morbidity, as indicated by hospital admissions for respiratory illness. In the last decade studies of the short-term effects of PM – based on association between daily changes in PM10 concentrations and various health outcomes – were conducted all over Europe. Keywords: air; concentrations; measuring; pm10; pm2.5; traffic
Hydrogen
- Solid Dispersions of Oxeglitazar in PVP K17 and Poloxamer 407 by Supercritical Antisolvent and Coevaporation Methods by Majerik, V.; Horváth, G.; Charbit, G.; Badens, E.; Szokonya, L.; Bosc, N.; Teillaud, E. (2006) - In solid solutions and solid dispersions drug molecules or very fine drug crystals are dispersed in a biologically inert and biocompatible matrix. However, conventional methods i.e. spray-drying, solvent evaporation and hot melt method are known to have inherent limitations, like poor particle recovery yield, high residual solvent content or thermal degradation of the API. Keywords: dispersions; dissolution; drug; fig; formulations; hydrogen; k17; oxeglitazar; poloxamer; prepared; pvp; sas; solubility; solvent
Chemistry
- Editorial Preface by , (2017) - László Rácz was the Head of the Chemistry Department in Eger when Professor Liszi joined to teach Physical Chemistry there. He was the head of the Department of Physical Chemistry for many years. Keywords: chemistry; eger
Quality
- QUALITY MANAGEMENT SYSTEM AS A TOOL OF PROCESS CONTROL FOR FOOD AND AGRO INDUSTRIES by Kollár, G.; Syposs, Z.; Viczián, G.; Mészáros, L.; Kollár-Hunek, K. (2001) - Keywords: Quality Management, ISO 9001:2000, customer requirements and satisfaction, Internet forms, food and agro industries Introduction A great number of prescription, rules, standards and monitoring practices are ensuring from farm to fork, that the food we eat becomes and remains safe and healthy, free from harmful substances, such as microbes or chemicals [2-4]. Internet methods and experiences in identification and analysis of customer requirements and satisfaction Using our quality audit experiences, two Internet ~uesti?nnaire forms have been created to identify and to mvesugate customer requirements, satisfaction and preferences. Keywords: customer; food; internet; iso; quality; requirements; satisfaction
- Investigations into Flour Mixes of Triticum Monococcum and Triticum Spelta by Kóczán-Manninger, Katalin; Badak-Kerti, Katalin (2018) - After 2 days of storage at room temperature, the crumbs of 100 % spelt flour bread degraded to an average quality. By mixing einkorn and spelt flours bread can be made, however, an acceptable ratio would not exceed 20 % of einkorn to 80 % of Tr. spelta flour. Keywords: bread; flour; gluten; quality; spelt; triticum
Wastewater
- Improvement of Biofilm Carriers for the Treatment of Automotive Industry Wastewater by Thury, P.; Bartha, L.; Gulyás, G.; Pitás, V.; Fazekas, B.; Kárpáti, Á. (2012) - Based on the results, it can be stated that the suggested advantageous characteristics of CNTs do not appear as it is mixed in the plastic raw material during the production of biofilm carriers. The absence of the significant difference observed between the examined carriers suggests that the production of biofilm carriers from recycled plastic could carry financial advantages compared to the control carrier. Keywords: biofilm; carriers; cod; removal; wastewater
- Nitrogen Removal Controlled by an Ammonium-Analyser at the North Pest Wastewater Treatment Plant by Kassai, Zsófia (2015) - Keywords: wastewater treatment, nitrogen removal, nitrification, denitrification, ammonium- analyser, operation control, periodic aeration 1. Effluent total nitrogen values between July and December 2010. Keywords: aeration; line; nitrogen; sludge; wastewater
- Biological Purification of Chemically Pre-Treated Dairy Wastewater Before Discharge into a Municipal Sewage Systems by Gulyás, Gábor; Fazekas, Bence; Varga, Regina; Kárpáti, Árpád (2015) - Dairy wastewater contains a high amount of dissolved and suspended solids. Keywords: activated sludge, biofilm, dairy wastewater, chemical oxygen demand, nutrient-poor wastewater 1. Introduction Milk processing requires high specific water consumption and considerable raw material waste effluents [1]. Keywords: biofilm; dairy; oxygen; sludge; wastewater
- Comparative Study of Advanced Oxidation Processes to Treat Petroleum Wastewater by Aljubourya, Dheeaa Al Deen Atallah; Palaniandy, Puganeshwary; Aziz, Hamidi Bin Abdul; Feroz, Shaik (2015) - Under acidic conditions, the solar photo-Fenton process is more efficient than solar TiO2 photocatalysis while it is less efficient under alkaline conditions. According to previous results [13], the solar photo- Fenton process is more efficient for petroleum wastewater treatment than solar TiO2 photocatalysis under acidic conditions. Keywords: cod; fenton; h2o2; petroleum; photocatalysis; processes; tio2; wastewater
Metal
- Halophytes and Proline: A Promising Possibility for Heavy Metal Remediation and Agricultural Restoration by Székely, Gyöngyi; Barta, Csengele Éva (2024) - [22] Alia, Saradhi, P.P.: Proline accumulation under heavy metal stress, J. Plant Physiol., 1991, 138(5), 554–558, DOI: 10.1016/s0176-1617(11)80240-3 [23] Bassi, R.; Sharma, S.S.: [2] Tiwari, S.; Lata, C.: Heavy metal stress, signaling, and tolerance due to plant-associated microbes: an overview, Front. Keywords: accumulation; doi; halophytes; metal; plant; pro; proline; salinity; species; stress; tolerance
- Formation, Photophysics, Photochemistry and Quantum Chemistry of the Out-of-Plane Metalloporphyrins by Valicsek, Zsolt; P. Kiss, Melitta; A. Fodor, Melinda; Imran, Muhammad; Horváth, Ottó (2017) - Higher temperatures and thermodynamic control are also necessary for the insertion of metal ions into the cavity produced by four pyrrolic nitrogens; resulting in the formation of typical metalloporphyrin complexes. Its planar structure with an extended conjugated π-electron system provides aromatic characteristics and a special coordination cavity for the binding of metal ions of suitable radius [1-2]. Keywords: complexes; coordination; formation; horváth; ions; metal; metalloporphyrins; plane; type; valicsek
Field
- Nonlinear Magnetic Properties of Magnetic Fluids for Automotive Applications by Horváth, Barnabás; Szalai, István (2020) - The aim of our research was to develop a measuring system which is capable of determining the nonlinear AC sus- ceptibility of magnetic fluids at discrete frequencies and in the presence of a high-intensity driving magnetic field. Introduction Regarding automotive applications, one of the most im- portant characteristics of magnetic fluids is their behav- ior in magnetic fields. Keywords: field; frequency; magnetic; measuring; nonlinear; susceptibility
Column
- Simulated Moving Bed (SMB) Separation of Pharmaceutical Enantiomers by Gál, G.; Hanák, L.; Argyelán, J.; Strbka, A.; Szánya, T. (2005) - 3,64 10 11,93 S isomer Productivity (mg S g-1 packing day-1) (mL min-1) Eluant consumption (mL eluent mg-1 S) RG OD SMB 01 10 11,55 4,29 0,23 3,59 3,72 RG OD SMB 02 RG OD SMB 03 With the help of experimental and theoretical optimization of SMB process (switching time decrease, feed concentration increase, volumetric flow-rate change, gradient methods application, column number increase, column configuration change etc.) Keywords: column; eluent; hexane; min-1; smb
Plant
- Plant Growth-Promoting Rhizobacteria – Biotechnological Tools to Improve Cereal Yields by Székely, Gyöngyi; Barta, Csengele (2022) - [3] Naeem, M.; Aslam, Z.; Khaliq, A.; Ahmed, J. N.; Nawaz, A.; Hussain, M.: Plant growth promoting rhizobacteria reduce aphid population and enhance the productivity of bread wheat, Braz. 9–14 DOI: 10.1016/j.bjm.2017.10.005 [4] Kloepper, J. W.; Schroth, M. N.: Plant growth promoting rhizobacteria on radishes, Proceedings of the 4th International Conference on Plant Pathogenic Bacteria. Keywords: doi; growth; pgpr; plant; rhizobacteria; stress; wheat; yield
- The Rhizosphere of Petrosimonia Triandra may Possess Growth-Inducing and Salinity-Tolerance Potential by Székely, Gyöngyi ; Szígyártó, Norbert Zsolt; Tóth, András ; Barta, Csengele (2022) - Another strategy of halophyte plant species to improve their range of salt tolerance is co-habitation with groups of rhizosphere-specific bacteria called plant growth-promoting rhizobacteria (PGPR), which live in the immediate vicinity of plants’ root systems (also referred to as the rhizosphere) as well as exert a positive https://doi.org/10.33927/hjic-2022-12 mailto:gyongyi.szekely@ubbcluj.ro SZÉKELY, SZÍGYÁRTÓ, TÓTH AND BARTA Hungarian Journal of Industry and Chemistry 12 effect on plant growth and development. 11–15 (2022) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2022-12 The Rhizosphere of Petrosimonia Triandra may Possess Growth- Inducing and Salinity-Tolerance Potential Gyöngyi Székely1,2,3*, Norbert Zsolt Szígyártó1,2, András Tóth1,2 and Csengele Barta4 1 Hungarian Department of Biology and Ecology, Faculty of Biology and Geology, Babeș -Bolyai University, 5-7 Clinicilor St., Cluj-Napoca, 400006, Romania 2 Institute for Research-Development-Innovation in Applied Natural Sciences, Babeș-Bolyai University, 30 Fântânele St., Cluj-Napoca, 400294, Romania 3 Centre for Systems Biology, Biodiversity and Bioresources (3B), Babeș -Bolyai University, 5-7 Clinicilor St., Cluj-Napoca, 400006, Romania 4 Department of Biology, Missouri Western State University, 4525 Downs Drive, Agenstein- Remington Halls, St. Joseph, MO 64507, USA The root microbiome of halotolerant plants can represent a great source of salt-tolerant plant growth-promoting rhizobacteria (ST-PGPR) with a wide range of beneficial effects on plants growth, development and productivity. Keywords: doi; growth; plant; saline; salinity; salt; soil; tolerance; triandra
Manufacturing
- Editorial Preface to the Special Issue Dedicated to the Manufacturing_2021 Conference by Gyurika, István (2022) - The presentations were mainly offered in English lan- guage, giving additional opportunities for PhD students to practice oral presentations of their scientific work and achieved results. The review com- mittee generated detailed feedback to the authors to show higher level of articulation of their ideas and results, and to maintain the scientific high level of the HJIC journal. Keywords: manufacturing
- Research on and Practice of Additive Manufacturing Technologies by Ficzere, Péter (2022) - 3, Budapest, 1111, HUNGARY Today, additive manufacturing technologies are becoming increasingly popular. Introduction The spread of additive manufacturing technologies con- tinues unabated. Keywords: additive; doi; manufacturing; material; parts; research; technologies
Cutting
- Mechanical Deburring of Drilling-Induced Exit Burrs in Carbon Fibre Reinforced Polymer Composites by Gödri, András; Helle, Anna Nikoletta; Geier, Norbert (2022) - Keywords: deburring, carbon fibre reinforced polymer, exit burr, drilling, digital image processing 1. Although the formation of burrs in quasi- homogeneous materials like metals has been studied for decades, research into burr formation in fibrous com- posites is not that extensive. Keywords: burrs; cfrp; cutting; deburring; drilling; fibre
- Research of the Mechanism of Plastic Strain in Case of Tempered Steel in Hard Turning by Szabó, G. (2010) - In the paper the change of the morphology of chip formation is compared depending on the cutting speed. 'Y ’ Y Figure 2: A supposed mechanism of chip formation in hard turning [3] 164 While the tool reaches point A from B’, there is a thermal tempering for a while in interval BD, later this interval gets back to its original strength and along the BE interval it bonds into the direction of the flank of the tool. Keywords: chip; cutting; formation; turning
- Experimental Results of Dry Drilling of Wear Resistant Steel by Kovács, A.; Varga, Gy. (2011) - During the course of the experiments, after each drilling distance of 90 mm, feed direction cutting force, drilling torque, flank wear, corner wear and average surface roughness were measured. The main advantages of dry cutting are as follows [6]: - this machining method is environmentally friendly, i.e. it does not generate air pollution in the workshop; - the machine operator is not subjected to insalubrious effects: no respiratory or skin diseases are experienced; - the expenses of chip cleaning (oil, emulsion or chemical relief) can be decreased; - there are no coolant and lubricant fluid- related (purchasing, storing, cleaning, disposal) costs; - the structure of machining-related expenses changes (the tool-related increases, but the cooling- and lubrication-related expenses do not change), thus, the production expenses decrease. Keywords: cutting; drilling; feed; min; speed; wear
- Rotational Turning in Precision Finishing by Sztankovics, I. (2011) - Table 1: Grouping of tangential feeds by the path of the tool edge and the number of cutting edges Path of the tool edge Linear Circular Si ng le -e dg ed N um be r o f e dg es M ul ti- ed ge d Grouping of tangential feeds by the spatial position of cutting edge Similar to other cutting tools, the cutting tools for methods using tangential feed can have different cutting edge inclination angles. These operations use super hard cutting tools in the machining of hardened steels (HRC>45). Keywords: cutting; edge; feed; tool; tool edge; turning; workpiece
Removal
- Ozonation of Biologically Refractory Pollutants by Almasiová, B.; Derco, J.; Kassai, A. (2008) - W = 70% 4 Conclusion Feasibility of ozone utilisation for MBT removal from wastewater was studied. Significant decrease of MBT content was observed after four minutes of ozonation. Keywords: cod; l-1; mbt; ozonation; ozone; removal; toc
- DEVELOPMENT FOR SELECTIVE CESIUM REMOVAL FROM THE EVAPORATION CONCENTRATES OF THE PWR PAKS by Szoke, S.; Pátzay, G.; Weiser, L. (2002) - S Cesium ion exchange breakthrough curves of un- and pretreated concentrates Fig.6 Filtration and ultrafiltration setup Filtration, adsorption and ultrafiltration experiments The effective removal of the various forms of the long lived radionuclides from evaporation concentrate was also investigated using filtration, ultrafiltration and adsorption processes. copper and cobalt KCoFC) are selective cesium ion exchangers. Keywords: cobalt; concentrate; evaporation; experiments; filtration; ion; removal; ultrafiltration
Flux
- Some Design Issues of Multi-Plate Magnetorheological Clutches by Törőcsik, D. (2011) - Torque calculation of plate type MR clutches We restricted our research to examine a plate clutch with a fixed inductor. B B a) b) Figure 3: MR-clutch constructions In the case of plate clutches (Fig. Keywords: clutch; clutches; fluid; flux; number; plates; torque
Chem
- Diastereoselective Alkylation of 4-Methyl-5-oxo-2-phenyl-1,3-oxazolidine-3-carboxylate and 2-Chloromethyl-isoindole-1,3-dione by Bsharat, Odey (2025) - 49–53 (2025) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2025-17 DIASTEREOSELECTIVE ALKYLATION OF 4-METHYL-5-OXO-2-PHENYL-1,3-OXAZOLIDINE-3-CARBOXYLATE AND 2-CHLOROMETHYL-ISOINDOLE-1,3-DIONE ODEY BSHARAT1* 1 Department of Chemistry, Faculty of Sciences, An-Najah National University, Nablus, P.O. Box 7, PALESTINE Asymmetric synthesis, that is, diastereoselective alkylation of a chiral auxiliary, is an important tool in organic synthesis. Educ., 1998, 75(10), 1226– 1258, DOI: 10.1021/ed075p1225 Keywords: alkylation; amino; chem; compound; doi; synthesis
Hungary
Controller
- Quasi-polynomial Representation-based Control of Mechanical Systems by Neukirchner, László; Magyar, Attila (2014) - Quasi-polynomial systems are good candidates for a general nonlinear system representation, since their global stability analysis is equivalent to the feasibility of a linear matrix inequality. The classical stabilizing state feedback problem for quasi-polynomial systems was extended with the ability of tracking time-dependent reference signals. Keywords: controller; form; quasi; robot
Speed
- Investigation of the Resistance a Sailboat is Subjected to in the Case of Draft Changes Caused by Modifying the Powertrain by Lévai, Emese; Ficzere, Péter (2021) - 4, the resistance (verti- cal axis) resulting from lighter load cases (denoted by the orange line) was less than for heavier load cases when the electric drive chain was in use (denoted by the gray line). If the immersion shape changes leading to the flow rate gener- ating early-breaking vortices around the hull or acceler- ating too quickly around the maximum width, a drastic reduction in speed results. Keywords: force; resistance; ship; speed
Min
- Separation of Organic Compounds by Gradient Simulated Moving Bed Chromatography by Nagy, M.; Szánya, T.; Molnár, Z.; Turza, G.; Gál, G.; Hanák, L.; Argyelán, J.; Aranyi, A.; Temesvári, K.; Horváth, Z. (2006) - The function of segment III is to separate steroid A and B and to produce steroid B in the LROUT flow. SYMBOLS cAcetone concentration of acetone, g dm-3 cB concentration of steroid B, g dm-3 cA concentration of steroid A, g dm-3 k number of components k’ Keywords: eluent; fig; lrout; min; raffinate; smb; steroid
- Enantioselective Alkoxylation of Β-Substituted Aromatic Nitroalkenes with Allyl Alcohol by Talybov, Gulahmad Mirahmad (2025) - 1H NMR (300 MHz, CDCl3): δ ppm: 7.08-7.14 (m, 2H), 7.06 (t, J= 7.0 Hz, 1H), 6.99 (d, J= 7.7 Hz, 1H), 5.85 (d.d.d, J= 17.23, 9.15, 5.34 Hz, OCH=, 1H), 5.31 (d.d.d, J= 17.23, 1.57, 1.61 Hz, H2C=, 1H,), 5.16 (d.d.d, J= 9.15, 1.57, 1.23 Hz, H2C=, 1H), 4.99 (d.d.d, J= 9.8, 6.0 Hz, 1H), 4.87 (d.d, J= 13.2, 9.9 Hz, 1H), 4.64 (d.d, J= 13.2, 6.0 Hz, 1H), 4.61 (d.d, J = 12.15, 5.34 Hz, OCH2, 1H), 4.16 (d.d.d, J= 12.15, 1.61, 1.23 Hz, OCH2, 1H), 2.40 (s, 3H) 13C NMR (100 MHz, CDCl3): δ ppm: 152.4, 136.5, 134.63 (-HC=), 128.3, 126.41, 126.40, 125.8, 117.67 (H2C=), 77.8, 72.32 (=C-CH2O), 45.6, 34.7, 31.2, 19.2 ee: 91% - chiral phase Chiralpak IC column (98/2 hexane/iPrOH, flow rate 0.5 mL/min, λ = 241 nm, tmajor = 25.0 min, tminor = 29.3 min) Compound No. 3: 1-Methyl-4-{(1S)-2-nitro-1-[(prop-2-en-1- yl)oxy]ethyl}benzene Yield: 0.44 g (89%). Methylene protons, when magnetically equivalent, associated with the nitro groups in compounds No. 1-9 are diastereotopic ( 0.4 ppm) in the form of two separate singlets at 1.03–1.05 ppm and appear in 1H NMR spectra in the form of two doublets with a geminal coupling constant 2J = 11.8 Hz. Keywords: d.d.d; h2c=; min
Fuel
- ADVANTAGEOUS AND DISADVANTAGEOUS PROPERTIES OF DIESEL FUELS OF LOW SULPHUR AND REDUCED AROMATIC CONTENT by Hancsók, J.; Varga, Z.; Szirmai, L. (2001) - [1 - 9): • reduction in the emission of acid rain precursor substances (S02, NOJ and particulates • reduction in the rate of the decrease in the total basic number of lubricating oil by lowering the amount of combustion products of nitrogen and sulphur compounds having acid character • reduction in the rate of increasing the viscosity by lowering the formation of particulates which can get into the lubricating oil • longer lubricating oil drain intervals are possible because of the lower solids formation and by reserving the base content of the lubricating oil for an extended period • by applying diesel fuels of low sulphur content, the total base number (TBN) of the lubricating oil can be reduced, consequently ash containing detergent· dispersant additives may be applied in lower level and the lower ash level contributes to operating of the exhaust treating catalysts and particulate filters more effectively and for a longer period • the lubricity improver additives are applied to diesel fuels not merely for reducing the wear of the fuel pump but it results in the same effects on different parts of the combustion chamber increasing the lifetime of the engine • the reduction in the NO content of exhaust gases contributes to decreasing the ozone problems in the upper air (where the problem is the ozone depletion} 58 Table In the paper the different quality grades of diesel fuels of low sulphur and reduced aromatic content are summarized (on the base of various degrees of reduction in sulphur and aromatic content). Keywords: aromatic; content; diesel; fuel; lubricity; sulphur
Tool
Frequency
- A Framework for Demonstration Devices Used in Distance-Learning Environments by Decsi, Péter; Bors, Ádám; Kocsor, Péter; Vörös, Bálint; Horváth, Barnabás; Guba, Sándor; Gugolya, Zoltán; Mester, Sándor; Szalai, István (2021) - Induction motor drivetrain Induction motors are widely used in industry due to their simple and rugged construction, cost-effectiveness as well as maintenance-free and efficient operation. The first three tabs on the program consist of lessons concerning induction motors and VFDs as well as a tuto- rial for configuring the inverters. Keywords: clutch; demonstration; device; distance; framework; frequency; induction; learning; measurement; motor
Soil
- Heavy Metal Balance in a Communal Wastewater Treatment Plant by Győri, Zoltán; Boros, Norbert; Sipos, Péter; Bertáné Szabó, Emese; Kovács, Katalin; Horváth, Márk; Takács, Anita; Heltai, György (2015) - [19] Szabó, Sz.; Posta, J.; Gosztonyi, Gy.; Mészáros, I.; Prokisch, J.: Heavy metal content of flood sediments and plants near the River Tisza, AGD Landscape Environ., 2008 2, 120–131 ISSN 1789- 7556 Keywords: River Tisza, floodplain soils, heavy metal pollution, Lakanen-Erviö extraction, nitric acid/peroxide extraction 1. Keywords: contents; metals; pollution; river; soil; tisza; vásárosnamény
Composites
Graph
- Structural Analysis of Process Models Using Their Representation Graph by Leitold, A.; Gerzson, M. (2009) - Dynamic representation graph The value of differential variables is usually computed by using a numerical integration method. Figure 1: Dynamic representation graph assuming first order explicit solution method The structural analysis based on graph theoretical technique is carried out in steps performed sequentially. Keywords: differential; graph; index; model; representation; representation graph
- Numerical Method-Independent Structural Solvability Analysis of DAE Models by Leitold, A.; Hangos, K. M. (2005) - x x1 xn x' t x x1 xn x' t+h Fig.10 Dynamic representation graph assuming single implicit solution method 19 M t t+h F U TL p TF
pF Q L hL hL * hF U' M' s M F U TL p TF pF Q L hL hF U' M' s hL * Fig.11 Representation graph of model M1 with Specification 1 assuming an implicit solution method ( circle of calculation) Dynamic representation graph The value of differential variables is usually computed by using a numerical integration method. Keywords: differential; graph; representation
Equations
- TIME SERIES AND THE ALGEBRAIC MATRIX RICCATI EQUATION by Storey, C. (2002) - Keywords: autoregressive time series, Yule-Walker equations, algebraic matrix Riccati equations, total least squares Introduction Determination of the autoregressive parameters ai,i = O,l,···,n, (1) in the stochastic process (2) where (3) i=o is investigated. Two different sets of parameter values are given for each of two different suggested models: Modell Tent: y(t) -1.32y(t -1) + 0.63y(t- 2) = w(t) , Final: y(t) -1.42y(t Keywords: equations; final; numerical; series
Points
- B-SPLINES CONTRA BÉZIERSPLINES by Herrmann, N. (2001) - A typical choice is to consider spline functions which are linear outside the interval xn+l+I) knot sequence N li B-Splines (t- x)~ +-function A =(X0 , ••• ,xn+l) given knots C1 - 1[a.b] (l-1)-times continuously differentiable functions IP 1 vector space of polynomials of degree less or equall S1(A) Q B1(x) do, ... ,dn Bt(x) xn(x) s(x) a/ Po, ... ,Pq l(x) vector space of spline functions infinite knot sequence B-Spline curve de Boor points Bernstein polynomials Bezier curve spline function coefficients in the de Boor algorithm interpolation points linear spline function difference quotients REFERENCES 1. COSTATINI, P., MORANDI, R.: Keywords: points; splines
- Control Operation and Analysis of the Spur Gears Profile by Faluvegi, E.; Cristea, L. (2011) - Keywords: cylindrical gear, involute profile, profile error, graphical user interface. The theoretic profile of cylindrical gear can be described with an involute curve detected in the front section. Keywords: coordinate; errors; gear; gui; measuring; points; profile; theoretical
Batch
Compounds
- Study on Analysis of Antibiotic Compounds from Enthomopathogenic Bacteria by Ft-Ir by Vozik, D.; Madarász, J.; Csanádi, Z.; Fodor, A.; Dublecz, K.; Bélafi-Bakó, K. (2012) - Figure 1: Antibiotic compounds purified with iPrOH from EMA Figure 2: Antibiotic compounds purified with MeOH from EMA Figure 3: Antibiotic compounds purified with iPrOH form EMC 85 All other side chain absorption overlap with the absorption of other side chains or of the polypeptide backbone and further experiments are needed to assign an absorption band to a specific side chain moiety. Keywords: amino; bacteria; cm-1; compounds; meoh; peptides; proteins
Index
- Preparation and Characterization of ZnO and TiO2 Sol-Gel Thin Films Deposited by Dip Coating by Baranyai, R.; Detrich, Á.; Volentiru, E.; Hórvölgyi, Z. (2009) - 136 REFERENCES 1 FERNANDES D. M., SILVA R., WINKLER HECHENLEITNER A. A., RADOVANOVIC E., CUSTÓDIO MELO M. A., GÓMEZ PINEDA E. A.: Synthesis and characterization of ZnO, CuO and a mixed Zn and Cu oxide, Materials Chemistry and Physics 115 (2009) 1, 110 2 IRIMPAN L., KRISHNAN B., NAMPOORI V. P. N., RADHAKRISHNAN P.: Nonlinear optical characteristics of nanocomposites of ZnO–TiO2–SiO2, Optical Materials 31 (2008) 2, 361 3 KURZ A., AEGERTER M. A.: Novel transparent conducting sol–gel oxide coatings, Thin Solid Films 516 (2008) 14, 4513 4 PÁL E., SEBŐK D., HORNOK V., DÉKÁNY I.: Structural, optical, and adsorption properties of ZnO2/poly(acrylic acid) hybrid thin porous films prepared by ionic strength controlled layer-by-layer method, Journal of Colloid and Interface Science 332 (2009) 1, 173 5 KÖNENKAMP R., WORD R. C., GODINEZ M.: Ultraviolet electroluminescence from ZnO/polymer heterojunction light-emitting diodes, Nano Letters 5 (2005) 10, 2005 6 GUO H., ZHOU J., LIN Z.: ZnO nanorod light- emitting diodes fabricated by electrochemical approaches, Electrochemistry Communications 10 (2008) 1, 146 7 MARTÍNEZ M. A., HERRERO J., GUITÉRREZ: Deposition of transparent and conductive Al- M. T. doped ZnO thin films for photovoltaic solar cell, Solar Energy Materials and Solar Cells 45 (1997) 1, 75 8 NÉMETH Á., MAJOR CS., FRIED M., LÁBADI Z., BÁRSONY I.: Spectroscopic ellipsometry study of transparent conductive ZnO layers for CIGS solar cell applications, Thin Solid Films 516 (2008) 20, 7016 9 KAY A., GRÄTZEL M.: Low cost photovoltaic modules based on dye sensitized nanocrystalline titanium dioxide and carbon powder, Solar Energy Materials and Solar Cells 44 (1996) 1, 99 10 GRÄTZEL M.: 34 ARMELAO L., FABRIZIO M., GIALANELLA S., ZORDAN F.: Sol-gel synthesis and characterisation of ZnO-based nanosystems, Thin Solid Films 394 (2001) 12-13, 90 35 RATANA T., AMORNPITOKSUK P., RATANA T., SUWANBOON S.: The wide band gap of highly oriented nanocrystalline Al doped ZnO thin films from sol-gel dip coating, Journal of Alloys and Compounds 470 (2009) 1-2, 408 36 DUTTA M., MRIDHA S., BASAK D.: Effect of sol concentration on the properties of ZnO thin films prepared by sol–gel technique, Applied Surface Science 254 (2008) 9, 2743 37 TRAPALIS C., TODOROVA N., ANASTESCU M., ANASTESCU C., STOICA M., GARTNER M., ZAHARESCU M., STOICA T.: Atomic force microscopy study of TiO2 sol-gel films thermally treated under NH3 atmosphere, Thin Solid Films 517 (2009) 23, 6243 38 DEÁK A., HILD E., KOVÁCS A. L., HÓRVÖLGYI Z.: Keywords: films; index; layers; sar; sol; thickness; thin; tio2; withdrawal; zno
Composition
- Enantioselective Catalytic Three-Component Synthesis of Optically Active Propargyl Amino Ethers by Talybov, Gulahmad Mirahmad (2025) - Chem., 2021, 86(24), 17955–17964, DOI: 10.1021/acs.joc.1c02296 N H CH3 HO CH3 NH R 1 O R R 2 n Figure 2: Scheme of how the protons of pseudoephedrine interact with the hydrogen bonds of propargyl amino ethers Table 1: Enantioselective reactions of benzaldehyde as well as its methoxy-substituted derivatives and propargyl ethers with aniline in the presence of a chiral catalyst – pseudoephedrine Entry Time (h) Yield (%) de (%) [11], the synthesis of novel compounds No. 1-7 is the first time that propargyl ethers have been used. Keywords: composition; doi; ethers; propargyl
Position
- The Application of Probability Theory for Drilling by Monostori, R.; Dudás, I. (2010) - Drilling Through hole drilling is the procedure when we make a hole into a standing or rotating brief workpiece. The definition of the position of holes It is possible to determine the position of the holes in many ways. Keywords: axis; boring; drill; figure; hole; position; workpiece
Angle
- Modeling and Calculation of the Global Solar Irradiance on Slopes by Bálint, Roland; Fodor, Attila; Szalkai, István; Szalkai, Zsófia; Magyar, Attila (2019) - Keywords: solar irradiance, modeling, solar geometry, inclined surface 1. A general model of the angle of incidence of solar irradiance with regard to the azimuth is derived in Ref. Keywords: angle; earth; irradiance; sun
Light
- Simulation of color afterimages: An approach to computing virtual color perception by Garai, Lőrinc; Horváth, András (2018) - Hungarian Journal of Industry and Chemistry BIOPHYSICAL MODEL OF COLOR AFTERIMAGES 21 Table 3: Comparison of virtual color perception intensity in model situations and in validation test results Ranking in model Ranking category Ranking in validation test results ID Rank ID Median of ranking Corre- lation R → G 1 High B → G 1.00 No G2B2 → R 2 B2R2 → G 2.00 Yes G1B3 → R 3 R → G 3.00 Yes B2R2 → G 4 B → R2G2 4.00 No R → G2B2 5 Medium R → G2B2 4.00 Yes R2G2 → B 6 Low G1B3 → R 4.50 No G → B2R2 7 G2B2 → R 5.00 No B → G 8 G → B2R2 5.00 Yes B → R2G2 9 R2G2 → B 7.00 Yes Matching percentage between model and validation test results: 56% Table 4: Comparison of virtual color perception time pe- riod in model situations and in validation test results Ranking in model Ranking category Ranking in validation test results ID Rank ID Median of ranking Corre- lation R → G2B2 1 High B → G 1.00 No R → G 2 G1B3 → R 2.00 No G → B2R2 3 B → R2G2 3.00 No B2R2 → G 4 R → G2B2 4.00 Yes R2G2 → B 5 Medium G2B2 → R 4.00 No G2B2 → R 6 Low G → B2R2 4.50 No B → R2G2 7 B2R2 → G 5.00 No G1B3 → R 8 R → G 5.00 No B → G 9 R2G2 → B 7.00 No Matching percentage between model and validation test results: 11% • Second, the eyes of the subject were fixed on a circle at the center of the subsequent colored image (Fig. 4) for 30 seconds. A subordinate of afterimages defined in our research is virtual color perception, that is in our interpretation an unusual and intense temporary color perception provoked by a rapid change in the color of the incident light. Keywords: color; incident; light; model; perception; photopigment
Software
- Study on the Photo-Based 3d Scanning Process by Kristály, Álmos; Ficzere, Péter (2022) - Figure 7: Generated models of the automobile and the motorcycle. be seen on the motorcycle, along with the inaccuracy of the tires, especially on areas close to the ground. CNC codes can be generated directly from digital 3D geometries (CAD models, Fig. Keywords: dimensions; models; photos; software
Equilibrium
Viscosity
Torque
Starch
- The Production and Investigation of Starch Based Slow Released Encapsulating Agents by Meiczinger, M.; Marton, Gy. (2010) - In this paper we present our experiences about dissolution of the zinc and copper in different pH. Keywords: slow release, encapsulating agent, starch derivatives Introduction For many years our research group deals with the improvement of starch derivatives, which are able to slow release of micro components as fertilizers. Through the modification of starch, we replaced some of its OH groups in the anhydroglucose monomer unit by the ionic groups of phosphate with chemical reaction. Keywords: day; dissolution; starch
Food
- Analysis and Identification of Polyphenolic Compounds in Green Foods Using a Combination of HPLC-ESI-IT-TOF-MS/MS by Škvára, Pavel; Kezmanová, Júlia; Mišľanová, Csilla; Vojs Staňová, Andrea (2018) - Chemistry and Biochemistry of Dietary Polyphenols, Nutrients, 2010 2(12), 1231–1246 DOI: 10.3390/nu2121231 [6] Orčić, D.; Francišković, M.; Bekvalac, K.; Svirčev, E.; Beara, I.; Lesjak, M.; Mimica-Dukić, N.: Quan- titative determination of plant phenolics in Urtica dioica extracts by high-performance liquid chro- matography coupled with tandem mass spectromet- ric detection, Food Chemistry, 2014 143, 48–53 DOI: 10.1016/j.foodchem.2013.07.097 [7] Baskaran, R.; Pullencheri, D.; Somasundaram, R.: Characterization of free, esterified and bound phenolics in custard apple (Annona squamosa L) fruit pulp by UPLC-ESI-MS/MS, Food Re- search International, 2016 82, 121–127 DOI: 10.1016/j.foodres.2016.02.001 [8] Comandini, P.; Lerma-García, M. J.; Simó-Alfonso, E. F.; Toschi, T. G.: Tannin analysis of chestnut bark samples (Castanea sativa Mill.) by HPLC- DAD–MS, Food Chemistry, 2014 157, 290–295 DOI: 10.1016/j.foodchem.2014.02.003 [9] Ma, Y.; Kosińska-Cagnazzo, A.; Kerr, W. L.; Amarowicz, R.; Swanson, R. B.; Pegg, R. B.: Separation and characterization of phenolic com- pounds from dry-blanched peanut skins by liq- uid chromatography–electrospray ionization mass spectrometry, J. Chromatography A, 2014 1356, 64–81 DOI: 10.1016/j.chroma.2014.06.027 [10] Jiang, H.; Timmermann, B. N.; Gang, D. R.: Char- acterization and identification of diarylheptanoids in ginger (Zingiber officinale Rosc.) using high- performance liquid chromatography/electrospray ionization mass spectrometry, Rapid Communica- tions in Mass Spectrometry, 2007 21(4), 509–518 DOI: 10.1002/rcm.2858 [1] Gil, E. S.; Couto, R. O.: Flavonoid electrochem- istry: a review on the electroanalytical applications, Revista Brasileira de Farmacognosia, 2013 23(3), 542–558 DOI: 10.1590/s0102-695x2013005000031 [2] Boros, B.; Jakabová, S.; Dörnyei, Á.; Horváth, G.; Pluhár, Z.; Kilár, F.; Felinger, A.: Deter- mination of polyphenolic compounds by liquid chromatography–mass spectrometry in Thymus species, J. Chromatography A, 2010 1217(51), 7972–7980 DOI: 10.1016/j.chroma.2010.07.042 [3] Ginjom, I.; D’Arcy, B.; Caffin, N.; Gidley, M.: Phe- nolic compound profiles in selected Queensland red wines at all stages of the wine-making pro- cess, Food Chemistry, 2011 125(3), 823–834 DOI: 10.1016/j.foodchem.2010.08.062 Keywords: doi; food
Technologies
- Comparative Analysis of Burrs in UD-CFRP Composites Using Advanced Hole Machining Technologies by Helle, Anna Nikoletta; Pereszlai, Csongor; Gödri, András; Geier, Norbert (2022) - The current experimental study focuses on the analysis of burrs in- duced by advanced hole machining technologies (helical milling, tilted helical milling and wobble milling) and comparison with a conventional one (conventional drilling). The length of burrs was the longest in the case of holes machined by helical milling, followed by tilted helical milling. Keywords: burrs; drilling; hole; machining; milling; technologies
Signal
- Study of Composite Pipelines Damaged by Corrosion: Control by Non-Destructive Testing by Lecheb, Samir; Daoui, Abdelhakim; Brihmat, Chahira; Mechakra, Hamza; Chellil, Ahmed; Safi, Brahim; Kebir, Hocine (2023) - Experimental investigation of reflection in guided wave-based inspection for the characterization of pipeline defects, NDT E Int., 2010, 43(4), 365–374, DOI: 10.1016/j.ndteint.2010.01.002 The most common forms of pipeline defects are shown in Figures 1a-e. Corrosion is the most frequent initial cause of damage in hydrocarbon pipelines Keywords: crack; defects; doi; figure; inspection; ndt; pipeline; signal; testing; waves
Technology
- The Industrial Specialisation of Science and Technology Parks Through the Example of Zalazone Park by Csordás, Andrea; Háry, András; Tóth, Csilla (2025) - Based on these perspectives, ZalaZONE Park is placed in the activity-based classification system of innovation ecosystems, the analysis of which provides an opportunity for other science parks and areas of innovation (AOIs) to carry out a self-assessment according to the outlined framework, thereby outlining new strategic directions. Following the theoretical overview, the research introduced the activity-based classification method of innovation ecosystems, which foresees the definition of the sectoral character of ZalaZONE Park, the pillars of which are NACE codes, the sectoral focus generated from them and the technological focus. Keywords: actors; classification; ecosystems; figure; focus; innovation; park; research; science; technology; zalazone
Ion
Fibre
Iso
- Complementary Manipulator Tool Development for Safe Cobot-Assisted Hydroponics by Paniti, Imre; Nacsa, János; Szűr, Dávid; Rácz, Sándor; Tóth, József (2022) - Conclusion Hydroponics is a subset of hydroculture, which is an environmentally friendly technology for growing plants in the absence of soil by using mineral nutrient solu- tions dissolved in water. Zone 1: Primary process area • Zone 2: Secondary process area • Zone 3: Surrounding equipment Figure 3: Plant roots in the Hydro pot. Keywords: clip; cobot; directive; fig; hydroponic; iso; safety
Development
- Relationship between Input Channel Excitation Time and Profinet IO Refresh Time by Kollár, K. (2011) - Keywords: local economic development instrument, local economic development strategy, human resource development, direct service development, Economic Development Scheme of Vienna Introduction As we examine the international and national literature we can see that the regulatory and organizational system of the countries are quite differentiated and diverse but in the case of economic development tools used by local actors the situation isn't the same, in fact they are very similar. The process of local economic development is extremely complex. Keywords: business; city; development; enterprises; improvement; instruments; support; tax; tools; vienna
Recovery
Factors
- Thoughts about the Clear Energy by Farkas, A.; Faragó, P. (2011) - Keywords: association, attitudes, energy sources, knowledge The aim of the survey If we want every layer of society to cooperate for success we need society to believe in alternative energy sources and acquire the basic knowledge related to it. In this research we introduce how university students look at alternative energy sources. Keywords: attitude; energy sources; factors; findings; interviewees; knowledge; research; respondents; students; university
Electrophoresis
- Determination of Homocysteine in Urine and Saliva by Microchip Electrophoresis by Troška, Peter; Mandžáková, Anna; Hradski, Jasna; Ševčík, Juraj; Masár, Marián (2018) - Anal., 1997 15(9–10), 1435–1441 DOI: 10.1016/S0731- 7085(96)02051-1 [15] Vecchione, G.; Margaglione, M.; Grandone, E.; Colaizzo, D.; Cappucci, G.; Fermo, I.; D’Angelo, A.; Di Minno, G.: Determining sulfur-containing amino acids by capillary electrophoresis: A fast novel method for total homocyst(e)ine human plasma, Electrophoresis, 1999 20(3), 569–574 DOI: 10.1002/(SICI)1522-2683(19990301)20:3<569::AID- ELPS569>3.0.CO;2-S [16] Liang, Q.; Chen, H.; Li, F.; Du, X.: Simultane- ous sensitive MEKC-LIF determination of homo- cysteine, homoarginine, and six arginine metabolic derivatives in fluids from type 2 diabetics with pep- tic ulcer bleeding, Chromatographia, 2015 78(15– 16), 1049–1056 DOI: 10.1007/s10337-015-2919-6 [17] Ševčíková, P.; Glatz, Z.; Tomandl, J.: Determina- tion of homocysteine in human plasma by micel- lar electrokinetic chromatography and in-capillary detection reaction with 2,2’- dipyridyl disulfide, J. Chromatogr. A., 2003 990(1–2), 197–204 DOI: 10.1016/S0021-9673(03)00048-7 [18] Chassaing, C.; Gonin, J.; Wilcox, C.S.; Wainer, I.W.: Determination of reduced and oxidized ho- mocysteine and related thiols in plasma by thiol- specific pre-column derivatization and capillary electrophoresis with laser-induced fluorescence de- tection, J. Chromatogr. Chem., 2011 66(3), 317–321 DOI: 10.1134/S1061934811030075 [8] Melnikov, I.O.; Nazimov, I.V.; Stukacheva, E.A.; Glubokov, Y.: Determination of homocysteine and other low-molecular-weight amino thiols in blood plasma, J. Anal. Keywords: cze; doi; electrophoresis; homocysteine; itp
Complexes
- Separation of the Enantiomers of p-Chiral Cyclic Phosphorus Compounds by Ujj, V.; Szuhánszki, T.; Schindler, J.; Czugler, M.; Fogassy, E.; Keglevich, Gy. (2008) - In the next part of the work, resolution processes of 1a with (–)-3 were further tested in various other solvents or solvent mixtures, but no crystals were obtained. The antipodes of 1-aryl-, 1-alkyl- and 1-alkoxy-3-methyl-3-phospholene 1-oxides 1a-h were separated in good yields and in high enantiomeric excesses (up to >99% ee) by resolution via formation of diastereomeric complexes with (–)-(4R,5R)-4,5-bis(diphenylhydroxymethyl)-2,2-dimethyldioxolane (–)-2 (TADDOL) or (–)-(2R,3R)-α,α,α’,α’-tetraphenyl- 1,4-dioxaspiro[4.5]decan-2,3-dimethanol (–)-3. Keywords: complex; complexes; oxides; phospholene; resolution
Images
- Improving the efficiency of neural networks with virtual training data by Hollósi, János; Krecht, Rudolf; Markó, Norbert; Ballagi, Áron (2020) - Experience has shown that the efficiency of road surface detection is improved by using three times as many virtual images, while for protective barrier de- tection it is sufficient to only use virtual images. For road surface segmentation, five different datasets are created from the Cityscapes Dataset and our collec- tion of virtual images. Keywords: computer; dataset; images; networks; racing; segmentation; training
Change
- The Role of Raising Awareness in Ensuring the Resilience of Cities by Rjiba Iskander, Ben; Sebestyén, Viktor; Tóth-Nagy, Georgina (2024) - Climate change is an imminent threat to urban development and its adverse effects can only be mitigated with the collective efforts of city dwellers. By evaluating the level of awareness and relating it to the greenhouse gas emissions emitted by three selected countries - namely Germany, Brazil and Kenya - this study highlights the need for awareness-raising campaigns and community-engagement initiatives centered around the risks of climate change and its potential impact on cities. Keywords: awareness; brazil; change; cities; climate; doi; education; emissions; germany; kenya
Bacteria
- Combination of Chemical and Biological Methods for Effective Plant Protection by Vozik, Dávid; Bélafi-Bakó, Katalin (2020) - 2012, 40(2), 83–86 https://mk.uni- pannon.hu/hjic/index.php/hjic/article/download/346/316 [13] Böszörményi, E.; Érsek, T.; Fodor, A.; Földes, L. Sz.; Hevesi, M.; Hogan, J. S.; Katona, Z.; Klein, M. G.; Kormány, A.; Pekár, Sz.; Szentirmai, A.; Sztar- icskai, F.; Taylor, R. A. J.: Isolation and activity of 48(2) pp. Entomopathogenic bacteria live in symbiosis with en- tomopathogenic nematodes [3,4]. Keywords: bacteria; nematodes; xenorhabdus
Parameter
- Modeling and Parameter Sensitivity Analysis of a Synchronous Motor by Neukirchner, L.; Fodor, A.; Magyar, A. (2011) - Motor parameters The parameters are described only for phase a since the machine is assumed to have symmetrical tri-phase stator windings system. Figure 4: Model responses for the +90% changing of parameter D Figure 5: Model responses for the +90% changing of parameter r stator resistance Not sensitive: Keywords: model; parameter; ⎢ ⎢; ⎢ ⎣; ⎣ ⎡; ⎥ ⎥; ⎥ ⎦
Ebc
- Study of Various Parameters that Influence the Content of Exhaled breath Condensate Used in the Diagnosis of Gastroesophageal Reflux Disease by Greguš, Michal; Ďurč, Pavol; Lačná, Júlia; Foret, František; Kubáň, Petr (2018) - [1] Shaheen, N. J.; Hansen, R. A.; Morgan, D. R.; Gan- garosa, L. M.; Ringel, Y.; Thiny, M. T.; Russo, M. W.; Sandler, R. S.: The burden of gastrointestinal and liver diseases, Am. 29-33 (2018) 34 GREGUŠ, ĎURČ, LAČNÁ, FORET AND KUBÁŇ [14] Ahmadzai, H.; Huang, S.; Hettiarachchi, R.; Lin, J. L.; Thomas, P. S.; Zhang, Q.: Exhaled breath con- densate: a comprehensive update, Clin. Keywords: doi; ebc
Scheduling
- Using Graphical Processing Units in Scheduling Problems by Mihály, K.; Hornyák, O. (2011) - Our goal is to use this specialized graphical platform for solving scheduling problems. This paper is an initial research of the existing platforms and solutions in general and describes the existing solutions in fact of scheduling problems. Keywords: cuda; gpu; hardware; memory; parallel; problems; processing; scheduling
Students
- Editorial Preface by , (2014) - Even those students who do not continue their life in the academia tend to remember their time spend on TDK activities as useful and memorable. editorial EDITORIAL PREFACE The Editorial Board of HJIC dedicates this Issue to the National Scientific Students’ Associations (Tudományos Diákkör, in Hungarian, abbreviated as TDK) that is a real Hungaricum with a 62 years old tradition. Keywords: students
Phosphorylation
- Semiquantitative Assessment of Dishevelled-3 Phosphorylation Status by Mass Spectrometry by Hanáková, Kateřina; Potěšil, David; Bernatík, Ondřej; Cervenka, Igor; Rádsetoulal, Matěj; Bryja, Vítězslav; Zdráhal, Zbyněk (2018) - 4 HANÁKOVÁ, POTĚŠIL, BERNATÍK, ČERVENKA, RÁDSETOULAL, BRYJA, AND ZDRÁHAL Figure 1: Comparison of phosphorylation sites of hDvl3 induced by CK1ε and NEK2. Phosphorylation sites identified only by NEK2 are indicated by red background color. analyzed by liquid chromatography coupled with mass spectrometry (LC-MS/MS) for protein identification (ID run). Keywords: ck1ε; dvl3; nek2; phosphorylation; sites
Concentrates
- Properties of Polyamide 6 Fibres Modified by Silicate Nanoparticles by Vass, I.; Krištofiè, M.; Ryba, J. (2008) - Fibres modified by concentrate C have the best tensile strength in comparison with other modified fibres, particularly when the amount of concentrate in fibres is lower, i.e. 5 and 10 wt.% and at the drawing ratio 3.5. [NH(CH2)5CO]m - OH + (2n-1) H2O NH3 CH2 CH2 - The second part of contribution deals with the preparation of polyamide 6 (PA 6) fibres non-modified and modified by concentrates and determination of some properties (i.e. mechanical, sorptive, barrier and thermal properties) of modified fibres, too. Keywords: concentrates; fibres
Head
- Finite Element Method Analysis of Hip-Joint Prosthesis by Monostori, R.; Dudás, I. (2011) - Metal parts (for example, the stem and the sphere head) of hip prostheses are made of either stainless steel or another metal, for example, titanium. The companion piece (for example socket) is made of polythene [1]. Keywords: figure; head; hip; joint; prosthesis; socket
Workshop
- Editorial Preface to the Special Issue Dedicated to the Workshop Self-Driving Vehicles by Szalai, István (2020) - 1–1 (2020) hjic.mk.uni-pannon.hu DOI: 10.33927/hjic-2020-01 EDITORIAL PREFACE TO THE SPECIAL ISSUE DEDICATED TO THE WORKSHOP “SELF-DRIVING VEHICLES ISTVÁN SZALAI1 1Institute of Mechatronics Engineering and Research, University of Pannonia, Gasparich Márk utca 18/A, Zalaegerszeg H-8900, HUNGARY István Szalai Professional Leader ”Research of autonomous vehicle systems related to the autonomous test track in Za- laegerszeg“ (EFOP-3.6.2-16-2017-00002) https://doi.org/10.33927/hjic-2020-01 Keywords: workshop
Epilogue
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Created: 2025-12-26